Security Advisory

CVE-2026-49413

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-27 09:08:23

Last updated 2026-06-29 13:05:38

Assigner freebsd

CVSS score not scored

State PUBLISHED

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.

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