CVE-2026-49413: Freebsd

High severity, CVSS 7.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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

• Freebsd Freebsd: version 14.3 only; version 14.4 only; version 15.0 only

Published 2026-06-27. Last modified 2026-07-01.