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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-49415

Local privilege escalation via execve(2) TOCTOU race

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Status
Published
Published
Updated
Assigning organization
freebsd

Description

During execve(2) of a SUID binary, the new virtual address space is installed before the process credentials are updated. During this window, a process running as the same user can access the target process's memory via procfs or linprocfs, because the kernel's debugging permission check still saw the original credentials. An unprivileged local user can exploit this race to modify the address space of a SUID binary before its credentials are elevated, potentially gaining full control of the affected system.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FreeBSD FreeBSD

Default version status: unknown

  • 15.1-RELEASE to < p1affected
  • 15.0-RELEASE to < p11affected
  • 14.4-RELEASE to < p7affected
  • 14.3-RELEASE to < p16affected

References