Use After Free
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.
How It Works
Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated. When memory is freed, it returns to the allocator's pool and may be reallocated for an entirely different purpose. The original pointer becomes "dangling"—it still points to that memory location, but the contents are now undefined or controlled by different code.
Attackers exploit this by orchestrating a three-step process: first, trigger the memory deallocation; second, cause the allocator to reassign that same memory region with attacker-controlled data (often through carefully timed allocations); third, trigger the program to dereference the dangling pointer. Because the memory now contains attacker data instead of the expected object, this can corrupt function pointers, vtables, or other critical structures.
The vulnerability is particularly dangerous in object-oriented code where freed objects contain function pointers or virtual method tables. When the program calls a method on the freed object, it may jump to attacker-controlled addresses. Browser engines are frequent targets because DOM manipulation allows attackers to control object allocation and deallocation timing through JavaScript, while kernel UAFs enable privilege escalation by manipulating file descriptors or process structures.
Impact
- Arbitrary code execution — attacker overwrites function pointers or vtables to redirect program flow to malicious code
- Privilege escalation — in kernel UAFs, gain root/system privileges by corrupting process credentials or security tokens
- Information disclosure — read sensitive data from reallocated memory that wasn't properly cleared
- Sandbox escape — break out of browser or application sandboxes by corrupting security-critical objects
- Denial of service — crash the application through memory corruption, though attackers typically aim for exploitation rather than simple crashes
Real-World Examples
CVE-2021-30551 affected Chrome's V8 JavaScript engine, where improper handling of JavaScript typed arrays created a use-after-free in object property management. Attackers could trigger object deletion while retaining references, then reallocate the memory with controlled data to achieve code execution within the renderer process.
Windows kernel vulnerabilities like CVE-2020-17087 involved use-after-free conditions in the Windows keyboard layout handling code. Attackers exploited race conditions in keyboard layout switching to free kernel objects while retaining references, then reallocated the memory with controlled structures to elevate privileges from user to SYSTEM level.
The WhatsApp vulnerability CVE-2019-11932 demonstrated UAF exploitation in media parsing code, where specially crafted GIF files triggered premature memory deallocation. Subsequent access to the freed buffers allowed remote code execution without user interaction beyond receiving the malicious file.
Mitigation
- Memory-safe languages — use Rust, Go, Swift, or other languages with automatic memory management
- Smart pointers — employ RAII patterns and reference counting (unique_ptr, shared_ptr in C++)
- AddressSanitizer (ASAN) — detect UAF during testing through instrumented builds
- Immediate pointer nullification — set pointers to NULL after free() to cause immediate crashes rather than exploitable conditions
- Garbage collection — languages with GC prevent manual memory management errors
- Control Flow Integrity (CFI) — limits exploit impact by validating function pointer targets
- Heap hardening — allocator metadata protection and delayed reuse policies increase exploitation difficulty
Recent CVEs (6149)
Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1,. Rated high severity (CVSS 7.2), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 10.9%.
Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1,. Rated high severity (CVSS 7.2), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 13.8%.
Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1,. Rated high severity (CVSS 7.2), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 10.9%.
Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1,. Rated high severity (CVSS 7.2), this vulnerability is low attack complexity. Public exploit code available.
Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1,. Rated high severity (CVSS 7.2), this vulnerability is low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allows attackers to execute arbitrary code via unspecified vectors, a. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the phar_rename_archive function in phar_object.c in PHP before 5.5.22 and 5.6.x before 5.6.6 allows remote attackers to cause a denial of service or possibly have. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 11.2%.
Use-after-free vulnerability in the _zend_shared_memdup function in zend_shared_alloc.c in the OPcache extension in PHP through 5.6.7 allows remote attackers to cause a denial of service or possibly. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 19.1%.
Use-after-free vulnerability in the VisibleSelection::nonBoundaryShadowTreeRootNode function in core/editing/VisibleSelection.cpp in the DOM implementation in Blink, as used in Google Chrome before. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Adobe Flash Player before 13.0.0.269 and 14.x through 16.x before 16.0.0.305 on Windows and OS X and before 11.2.202.442 on Linux allows remote attackers to execute. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.
Use-after-free vulnerability in the Web Workers implementation in Google Chrome before 38.0.2125.101 allows remote attackers to cause a denial of service or possibly have unspecified other impact via. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The SessionService::GetLastSession function in browser/sessions/session_service.cc in Google Chrome before 38.0.2125.101 allows remote attackers to cause a denial of service (use-after-free) or. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the ProcessingInstruction::setXSLStyleSheet function in core/dom/ProcessingInstruction.cpp in the DOM implementation in Blink, as used in Google Chrome before. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Blink, as used in Google Chrome before 38.0.2125.101, allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the Event::currentTarget function in core/events/Event.cpp in Blink, as used in Google Chrome before 38.0.2125.101, allows remote attackers to cause a denial of. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the mozilla::DOMSVGLength::GetTearOff function in Mozilla Firefox before 32.0, Firefox ESR 31.x before 31.1, and Thunderbird 31.x before 31.1 allows remote attackers. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in MCPlayer.dll in Microsoft Windows Media Center TV Pack for Windows Vista, Windows 7 SP1, and Windows Media Center for Windows 8 and 8.1 allows remote attackers to. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. Epss exploitation probability 27.7%.
The snd_ctl_elem_add function in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not check authorization for SNDRV_CTL_IOCTL_ELEM_REPLACE commands,. Rated medium severity (CVSS 4.6), this vulnerability is low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not ensure possession of a read/write lock, which allows local users to cause a denial of service. Rated medium severity (CVSS 4.6), this vulnerability is low attack complexity. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
The __do_follow_link function in fs/namei.c in the Linux kernel before 2.6.33 does not properly handle the last pathname component during use of certain filesystems, which allows local users to cause. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
Use-after-free vulnerability in the nsHostResolver::ConditionallyRefreshRecord function in libxul.so in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the nsGenericHTMLElement::GetWidthHeightForImage function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The mozilla::dom::TextTrack::AddCue function in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 does not properly perform garbage collection for Text Track Manager variables, which allows. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Internet Explorer 6 through 11 contain a use-after-free vulnerability in CMarkup::IsConnectedToPrimaryMarkup that allows remote code execution, exploited as a zero-day in April 2014 with initial attribution to APT groups.
Use-after-free vulnerability in browser/ui/views/speech_recognition_bubble_views.cc in Google Chrome before 34.0.1847.131 on Windows and OS X and before 34.0.1847.132 on Linux allows remote attackers. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Integer overflow in the ping_init_sock function in net/ipv4/ping.c in the Linux kernel through 3.14.1 allows local users to cause a denial of service (use-after-free and system crash) or possibly. Rated medium severity (CVSS 6.9). Public exploit code available.
Use-after-free vulnerability in the nfqnl_zcopy function in net/netfilter/nfnetlink_queue_core.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory. Rated low severity (CVSS 2.9). Public exploit code available.
Use-after-free vulnerability in the skb_segment function in net/core/skbuff.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory by leveraging the. Rated low severity (CVSS 2.9). This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the TypeObject class in the JavaScript engine in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allows. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 12.9%.
Use-after-free vulnerability in the AttributeSetter function in bindings/templates/attributes.cpp in the bindings in Blink, as used in Google Chrome before 33.0.1750.152 on OS X and Linux and before. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Internet Explorer 9 and 10 contain a use-after-free vulnerability in CMarkup object handling exploitable via crafted JavaScript, used in 'Operation SnowMan' watering hole attacks targeting US military and defense in early 2014.
Use-after-free vulnerability in the imgRequestProxy function in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allows remote attackers. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 10.8% and no vendor patch available.
Use-after-free vulnerability in the Web Workers implementation in Google Chrome before 32.0.1700.76 on Windows and before 32.0.1700.77 on Mac OS X and Linux allows remote attackers to cause a denial. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Use-after-free vulnerability in the OnWindowRemovingFromRootWindow function in content/browser/web_contents/web_contents_view_aura.cc in Google Chrome before 32.0.1700.76 on Windows and before. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. Public exploit code available.
Multiple unspecified vulnerabilities in Google Chrome before 32.0.1700.76 on Windows and before 32.0.1700.77 on Mac OS X and Linux allow attackers to cause a denial of service or possibly have other. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the FormAssociatedElement::formRemovedFromTree function in core/html/FormAssociatedElement.cpp in Blink, as used in Google Chrome before 32.0.1700.76 on Windows and. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.9 and 11.x before 11.0.06 on Windows and Mac OS X allows attackers to execute arbitrary code via unspecified vectors. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and EPSS exploitation probability 74.7%.
Use-after-free vulnerability in the nsNodeUtils::LastRelease function in the table-editing user interface in the editor component in Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2,. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 10.4%.
Use-after-free vulnerability in the nsEventListenerManager::HandleEventSubType function in Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the PresShell::DispatchSynthMouseMove function in Mozilla Firefox before 26.0, Firefox ESR 24.x before 24.2, Thunderbird before 24.2, and SeaMonkey before 2.23 allows. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 11.1%.
Use-after-free vulnerability in the Scripting Runtime Object Library in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 33.6%.
Use-after-free vulnerability in lighttpd before 1.4.33 allows remote attackers to cause a denial of service (segmentation fault and crash) via unspecified vectors that trigger FAMMonitorDirectory. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the CDisplayPointer class in mshtml.dll in Microsoft Internet Explorer 6 through 11 allows remote attackers to execute arbitrary code or cause a denial of service. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.
Use-after-free vulnerability in Google Chrome before 27.0.1453.110 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors involving access to a. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the HTML5 Audio implementation in Google Chrome before 27.0.1453.110 allows remote attackers to cause a denial of service or possibly have unspecified other impact via. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 27.0.1453.110 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the handling. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 27.0.1453.110 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the handling. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 41.0% and no vendor patch available.
Use-after-free vulnerability in Microsoft Internet Explorer 8 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet Explorer. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 46.1%.
Use-after-free vulnerability in Microsoft Internet Explorer 6 and 7 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 41.0% and no vendor patch available.
Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 38.0%.
Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 24.8% and no vendor patch available.
Use-after-free vulnerability in Microsoft Internet Explorer 8 and 9 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 41.0% and no vendor patch available.
Use-after-free vulnerability in Microsoft Internet Explorer 9 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet Explorer. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 16.9%.
Use-after-free vulnerability in Microsoft Internet Explorer 8 and 9 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 41.0% and no vendor patch available.
Microsoft Internet Explorer 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly allocated or (2) is. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.
Use-after-free vulnerability in Microsoft Internet Explorer 6 through 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, as. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.
Use-after-free vulnerability in Google Chrome before 25.0.1364.97 on Windows and Linux, and before 25.0.1364.99 on Mac OS X, allows remote attackers to cause a denial of service or possibly have. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Google Chrome before 25.0.1364.97 on Windows and Linux, and before 25.0.1364.99 on Mac OS X, allows remote attackers to cause a denial of service (incorrect memory access) or possibly have. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 25.0.1364.97 on Windows and Linux, and before 25.0.1364.99 on Mac OS X, allows remote attackers to cause a denial of service or possibly have. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the nsPrintEngine::CommonPrint function in Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 allows remote attackers to execute. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the nsOverflowContinuationTracker::Finish function in Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the nsDisplayBoxShadowOuter::Paint function in Mozilla Firefox before 19.0, Thunderbird before 17.0.3, and SeaMonkey before 2.16 allows remote attackers to execute. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the nsImageLoadingContent::OnStopContainer function in Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the virNetMessageFree function in rpc/virnetserverclient.c in libvirt 1.0.x before 1.0.2, 0.10.2 before 0.10.2.3, 0.9.11 before 0.9.11.9, and 0.9.6 before 0.9.6.4. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable. Epss exploitation probability 20.2%.
Use-after-free vulnerability in Google Chrome before 24.0.1312.52 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to SVG layout. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the ~nsHTMLEditRules implementation in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.1, Thunderbird before 17.0.2, Thunderbird ESR. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.1, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.1, and SeaMonkey before 2.15 allows remote. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.
Use-after-free vulnerability in the imgRequest::OnStopFrame function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.1, Thunderbird before 17.0.2, Thunderbird ESR. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.
Use-after-free vulnerability in the mozilla::TrackUnionStream::EndTrack implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.1, Thunderbird before 17.0.2, Thunderbird ESR 17.x. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.
Use-after-free vulnerability in the obj_toSource function in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. No vendor patch available.
Use-after-free vulnerability in the mozVibrate implementation in the Vibrate library in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the ListenerManager implementation in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. This Use After Free vulnerability could allow attackers to access freed memory to execute arbitrary code or crash the application.
Use-after-free vulnerability in the serializeToStream implementation in the XMLSerializer component in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and EPSS exploitation probability 84.0%.
Use-after-free vulnerability in the TableBackgroundPainter::TableBackgroundData::Destroy function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Epss exploitation probability 13.4%.
Internet Explorer 6 through 8 contain a use-after-free vulnerability in CDwnBindInfo object handling that allows remote code execution through crafted websites, exploited as a zero-day in December 2012.
Use-after-free vulnerability in Google Chrome before 23.0.1271.97 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the URL loader. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 23.0.1271.97 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to visibility. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 23.0.1271.95 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the Media. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in Google Chrome before 23.0.1271.91 allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to SVG filters. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 on Mac OS X. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the BuildTextRunsScanner::BreakSink::SetBreaks function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Use-after-free vulnerability in the nsViewManager::ProcessPendingUpdates function in Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14 allows remote attackers to execute. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the gfxFont::GetFontEntry function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the nsPlaintextEditor::FireClipboardEvent function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.
Use-after-free vulnerability in the nsTextEditorState::PrepareEditor function in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable. Public exploit code available and no vendor patch available.