EUVD-2026-62365
GHSA-7h55-5jqw-fvcq
Severity by source
AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:L because exploitation requires local shell presence; AC:H for the kernel race window timing; PR:N since rfork(2) is available to any unprivileged user by default.
Primary rating from Vendor (freebsd).
CVSS VectorVendor: freebsd
Lifecycle Timeline
3DescriptionCVE.org
The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them. A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer.
An unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation.
AnalysisAI
FreeBSD's ELF core dump subsystem contains a TOCTOU race condition that allows an unprivileged local user sharing an address space via rfork(2) to trigger a kernel heap out-of-bounds write, potentially escalating privileges to root. Affected releases are FreeBSD 14.4-RELEASE prior to p8, 15.0-RELEASE prior to p12, and 15.1-RELEASE prior to p2, as confirmed in FreeBSD Security Advisory FreeBSD-SA-26:55.elf. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) an unprivileged local account with interactive shell access on the target FreeBSD system - remote unauthenticated exploitation is not possible given AV:L; (2) the ability to call rfork(2) to create a process sharing the parent's VM map, which is permitted to unprivileged users by default on FreeBSD and requires no special configuration; (3) the ability to trigger a core dump in the shared-address-space process, achievable by sending SIGABRT, SIGSEGV, or similar signals; (4) successfully timing a VM map mutation between the kernel's two passes over the map, which is a high-complexity (AC:H) race and may require many attempts. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H accurately characterizes a locally-scoped but potentially severe vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches to bring FreeBSD 14.4-RELEASE to patch level p8 or later, FreeBSD 15.0-RELEASE to p12 or later, and FreeBSD 15.1-RELEASE to p2 or later, as documented in FreeBSD Security Advisory FreeBSD-SA-26:55.elf at https://security.freebsd.org/advisories/FreeBSD-SA-26:55.elf.asc. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all FreeBSD systems running 14.4-RELEASE, 15.0-RELEASE, or 15.1-RELEASE and restrict local user access to affected systems prior to patching. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix XenServer 6.0.2 and earlier and
The rtsol(8) and rtsold(8) programs do not validate the domain search list options provided in router advertisement mess
The RFC 5011 implementation in rdata.c in ISC BIND 9.7.x and 9.8.x before 9.8.5-P2, 9.8.6b1, 9.9.x before 9.9.3-P2, and
Remote code execution in OpenSSH's sshd server (regression of CVE-2006-5051) allows unauthenticated remote attackers to
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remot
The vm_map_lookup function in sys/vm/vm_map.c in the mmap implementation in the kernel in FreeBSD 9.0 through 9.1-RELEAS
Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used
The Stream Control Transmission Protocol (SCTP) module in FreeBSD 9.3 before p33, 10.1 before p26, and 10.2 before p9, w
In FreeBSD 12.1-STABLE before r359565, 12.1-RELEASE before p7, 11.4-STABLE before r362975, 11.4-RELEASE before p1, and 1
A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) wa
The SCTP implementation in FreeBSD 8.2 allows remote attackers to cause a denial of service (NULL pointer dereference an
NFS in a BSD derived codebase, as used in OpenBSD through 7.4 and FreeBSD through 14.0-RELEASE, allows remote attackers
Same weakness CWE-362 – Race Condition
View allSame technique Privilege Escalation
View allShare
External POC / Exploit Code
Leaving vuln.today