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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-49413

Flaw in Linuxulator execution of setugid binaries

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Status
Published
Published
Updated
Assigning organization
freebsd

Description

The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag. During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables. An unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary.

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

  • 15.0-RELEASE to < p10affected
  • 14.4-RELEASE to < p6affected
  • 14.3-RELEASE to < p15affected

References