Null Pointer Dereference
A null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0).
How It Works
A null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0). In normal operation, pointers should reference valid memory locations before use. When a pointer is NULL—either uninitialized, explicitly set to NULL, or returned as NULL from a failed allocation—and the program tries to read from, write to, or execute code at that address, the operating system intervenes. On modern systems, accessing address zero triggers a segmentation fault that immediately terminates the process.
Attackers exploit this by manipulating program logic to force null pointer conditions. Common techniques include triggering allocation failures in low-memory conditions, providing malformed input that bypasses initialization checks, or exploiting race conditions where a pointer is checked for NULL but becomes NULL before use. The attacker identifies code paths where null checks are missing or inadequate, then crafts inputs to reach those vulnerable states.
On legacy systems without memory protection, attackers could map their own code at address zero, converting a crash into arbitrary code execution. Modern operating systems prevent this through mmap_min_addr restrictions that prohibit mapping memory below a threshold (typically 64KB). This mitigation has largely relegated null pointer dereferences to denial-of-service attacks rather than remote code execution vectors.
Impact
- Service disruption: Immediate process crash, taking down the vulnerable application or daemon
- Availability attacks: Repeated crashes forcing system restarts or service downtime
- Limited code execution: On unpatched legacy systems (pre-2009 Linux kernels, older embedded devices) where address zero mapping is possible
- Privilege escalation: In kernel-mode drivers where null dereferences can be exploited to execute attacker code with system privileges
Real-World Examples
The Linux kernel suffered from CVE-2009-2908, where null pointer dereferences in various subsystems could be exploited on systems allowing mmap at address zero. Attackers could map malicious code at NULL and trigger kernel null dereferences to achieve privilege escalation. This prompted the introduction of mmap_min_addr protections.
Microsoft Windows drivers have been frequent targets, including CVE-2020-17087 in the Windows kernel cryptography driver. Attackers triggered null pointer dereferences in kernel mode, which on older Windows versions could be exploited for local privilege escalation by controlling the null page.
Web browsers have experienced denial-of-service through null dereferences when parsing malformed content. Firefox CVE-2019-11707 involved a null pointer dereference in the IonMonkey JIT compiler, allowing attackers to crash the browser with specially crafted JavaScript, though not achieve code execution due to modern protections.
Mitigation
- Explicit null checks: Validate all pointers before dereferencing, especially after allocation or function calls that may return NULL
- Static analysis tools: Deploy analyzers like Coverity, Clang Static Analyzer, or PVS-Studio to detect missing null checks during development
- Address space layout: Enable
mmap_min_addrkernel protection (standard on modern Linux, typically 65536 bytes) - Fuzzing: Use AFL, libFuzzer, or similar tools to stress-test error handling paths and allocation failures
- Safe coding practices: Initialize pointers to NULL, use smart pointers in C++, adopt languages with built-in null safety
- Runtime bounds checking: Enable AddressSanitizer during testing to catch null dereferences immediately
Recent CVEs (4154)
The jp2_cdef_destroy function in jp2_cod.c in JasPer before 2.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted image. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
The PoDoFo::PdfColorGray::~PdfColorGray function in PdfColor.cpp in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The PoDoFo::PdfXObject::PdfXObject function in PdfXObject.cpp in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The PoDoFo::PdfVariant::DelayedLoad function in PdfVariant.h in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The GraphicsStack::TGraphicsStackElement::SetNonStrokingColorSpace function in graphicsstack.h in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The PoDoFo::PdfColor::operator function in PdfColor.cpp in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The ColorChanger::GetColorFromStack function in colorchanger.cpp in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The GraphicsStack::TGraphicsStackElement::~TGraphicsStackElement function in graphicsstack.h in PoDoFo 0.9.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The vrend_decode_reset function in vrend_decode.c in virglrenderer before 0.6.0 allows local guest OS users to cause a denial of service (NULL pointer dereference and QEMU process crash) by. Rated medium severity (CVSS 6.5), this vulnerability is low attack complexity.
The jp2_colr_destroy function in jp2_cod.c in JasPer before 1.900.13 allows remote attackers to cause a denial of service (NULL pointer dereference) by leveraging incorrect cleanup of JP2 box data on. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The jpc_tsfb_synthesize function in jpc_tsfb.c in JasPer before 1.900.9 allows remote attackers to cause a denial of service (NULL pointer dereference) via vectors involving an empty sequence. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
bitlbee-libpurple before 3.5.1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) and possibly execute arbitrary code via a file transfer request for a contact. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
BitlBee before 3.5 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) and possibly execute arbitrary code via a file transfer request for a contact that is not. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
gdk-pixbuf-thumbnailer.c in gdk-pixbuf allows context-dependent attackers to cause a denial of service (NULL pointer dereference and application crash) via vectors related to printing an error. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (NULL pointer dereference and panic) via a sysctl call with a path starting with 10,9. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available.
An issue was discovered in ImageMagick 6.9.7. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in ImageMagick 6.9.7. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The nickcmp function in Irssi before 0.8.21 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a message without a nick. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The dex_parse_debug_item function in libr/bin/p/bin_dex.c in radare2 1.2.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted DEX file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
The zzip_mem_entry_new function in memdisk.c in zziplib 0.13.62 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted ZIP file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The prescan_entry function in fseeko.c in zziplib 0.13.62 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted ZIP file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The PoDoFo::PdfParser::ReadXRefSubsection function in PdfParser.cpp in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
base/PdfOutputStream.cpp in PoDoFo 0.9.4 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The free_options function in options_manager.c in mp3splt 2.6.2 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The splt_cue_export_to_file function in cue.c in libmp3splt 0.9.2 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
coders/tiff.c in ImageMagick before 7.0.3.7 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted image. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
dwarf_form.c in libdwarf 20160115 allows remote attackers to cause a denial of service (crash) via a crafted elf file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in ytnef before 1.9.1. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The r_read_* functions in libr/include/r_endian.h in radare2 1.2.1 allow remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted binary file, as. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
An exploitable denial-of-service vulnerability exists in the fabric-worker component of Aerospike Database Server 3.10.0.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in certain Apple products. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in certain Apple products. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
The _dwarf_load_section function in libdwarf before 20160923 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The _dwarf_calculate_info_section_end_ptr function in libdwarf before 20160923 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The create_fullest_file_path function in libdwarf before 20160923 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted dwarf file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The print_frame_inst_bytes function in libdwarf before 20160923 allows remote attackers to cause a denial of service (NULL pointer dereference) via an object file with empty bss-like sections. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Type confusion in Histogram in Google Chrome prior to 56.0.2924.76 for Linux, Windows and Mac, and 56.0.2924.87 for Android, allowed a remote attacker to potentially exploit a near null dereference. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The dumpBuffer function in read.c in the listswf tool in libming 0.4.7 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted SWF file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
All versions of NVIDIA Windows GPU Display Driver contain a vulnerability in the kernel mode layer handler where a NULL pointer dereference caused by invalid user input may lead to denial of service. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
All versions of NVIDIA GPU Display Driver contain a vulnerability in the kernel mode layer handler where a NULL pointer dereference caused by invalid user input may lead to denial of service or. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
All versions of NVIDIA Windows GPU Display Driver contain a vulnerability in the kernel mode layer (nvlddmkm.sys) handler for DxgkDdiEscape where an attempt to access an invalid object pointer may. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
The get_vlc2 function in get_bits.h in Libav 11.9 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted mp3 file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
The get_vlc2 function in get_bits.h in Libav before 11.9 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted mp3 file, possibly related to. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
The ff_put_pixels8_xy2_mmx function in rnd_template.c in Libav 11.7 allows remote attackers to cause a denial of service (invalid memory access and crash) via a crafted mp3 file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The bmp_getdata function in libjasper/bmp/bmp_dec.c in JasPer before 1.900.5 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted BMP image in an imginfo. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available.
slock allows attackers to bypass the screen lock via vectors involving an invalid password hash, which triggers a NULL pointer dereference and crash. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
An issue was discovered in Artifex MuPDF before 1912de5f08e90af1d9d0a9791f58ba3afdb9d465. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and EPSS exploitation probability 17.6%.
The ipv4_pktinfo_prepare function in net/ipv4/ip_sockglue.c in the Linux kernel through 4.9.9 allows attackers to cause a denial of service (system crash) via (1) an application that makes crafted. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in St. Rated high severity (CVSS 8.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
The cjpeg utility in libjpeg allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or execute arbitrary code via a crafted file. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
libdwarf 20151114 and earlier allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a debug_abbrev section marked NOBITS in an ELF file. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
The git_oid_nfmt function in commit.c in libgit2 before 0.24.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via a cat-file command with a crafted object file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
GraphicsMagick 1.3.23 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted SVG file, related to the (1) DrawImage function in magick/render.c, (2). Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The bm_readbody_bmp function in bitmap_io.c in potrace before 1.13 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted BMP image, a different. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The bm_readbody_bmp function in bitmap_io.c in potrace before 1.13 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted BMP image, a different. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
The bm_readbody_bmp function in bitmap_io.c in potrace before 1.13 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted BMP image, a different. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
NULL pointer dereference in Samsung Exynos fimg2d driver for Android L(5.0/5.1) and M(6.0) allows attackers to have unspecified impact via unknown vectors. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The png_set_text_2 function in libpng 0.71 before 1.0.67, 1.2.x before 1.2.57, 1.4.x before 1.4.20, 1.5.x before 1.5.28, and 1.6.x before 1.6.27 allows context-dependent attackers to cause a NULL. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
ntpd in NTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to cause a denial of service (NULL pointer dereference) via a ntpdc reslist command. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. Epss exploitation probability 16.4% and no vendor patch available.
The TIFFFetchNormalTag function in LibTiff 4.0.6 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) by setting the tags TIFF_SETGET_C16ASCII or. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The php_wddx_pop_element function in ext/wddx/wddx.c in PHP 7.0.x before 7.0.15 and 7.1.x before 7.1.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
crypto/mcryptd.c in the Linux kernel before 4.8.15 allows local users to cause a denial of service (NULL pointer dereference and system crash) by using an AF_ALG socket with an incompatible. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
The WPG format reader in GraphicsMagick 1.3.25 and earlier allows remote attackers to cause a denial of service (assertion failure and crash) via vectors related to a ReferenceBlob and a NULL pointer. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
The _parse_pat function in the mpegts parser in GStreamer before 1.10.2 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
ntpd in NTP before 4.2.8p9, when the trap service is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted packet. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
The jpc_dec_tilefini function in libjasper/jpc/jpc_dec.c in JasPer before 1.900.8 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
A NULL pointer dereference vulnerability exists in the handling of the MXIT protocol in Pidgin. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.
A denial of service vulnerability exists in the handling of the MXIT protocol in Pidgin. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
ext/wddx/wddx.c in PHP before 5.6.28 and 7.x before 7.0.13 allows remote attackers to cause a denial of service (NULL pointer dereference) via crafted serialized data in a wddxPacket XML document, as. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Epss exploitation probability 11.6%.
QEMU (aka Quick Emulator) built with the USB EHCI emulation support is vulnerable to a null pointer dereference flaw. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
QEMU (aka Quick Emulator) built with an IDE AHCI emulation support is vulnerable to a null pointer dereference flaw. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.
The graphic acceleration functions in VMware Tools 9.x and 10.x before 10.0.9 on OS X allow local users to gain privileges or cause a denial of service (NULL pointer dereference) via unspecified. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
The graphic acceleration functions in VMware Tools 9.x and 10.x before 10.0.9 on OS X allow local users to gain privileges or cause a denial of service (NULL pointer dereference) via unspecified. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
The read_gab2_sub function in libavformat/avidec.c in FFmpeg before 3.1.4 allows remote attackers to cause a denial of service (NULL pointer used) via a crafted AVI file. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
All versions of NVIDIA Windows GPU Display Driver contain a vulnerability in the kernel mode layer (nvlddmkm.sys) handler for DxgDdiEscape where multiple pointers are used without checking for NULL,. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
All versions of NVIDIA Windows GPU Display Driver contain a vulnerability in the kernel mode layer (nvlddmkm.sys) handler for DxgDdiEscape where multiple pointers are used without checking for NULL,. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
XRegion in TigerVNC allows remote VNC servers to cause a denial of service (NULL pointer dereference) by leveraging failure to check a malloc return value, a similar issue to CVE-2014-6052. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The ReadDCMImage function in DCM reader in ImageMagick before 6.9.4-5 and 7.x before 7.0.1-7 allows remote attackers to have unspecified impact via vectors involving the for statement in computing. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
The DCM reader in ImageMagick before 6.9.4-5 and 7.x before 7.0.1-7 allows remote attackers to have unspecified impact by leveraging lack of NULL pointer checks. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-33. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-33. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-33. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.
An issue was discovered in the Tatsuya Kinoshita w3m fork before 0.5.3-33. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.