CVE-2026-49413 (GCVE-0-2026-49413)
Vulnerability from cvelistv5 – Published: 2026-06-27 09:08 – Updated: 2026-06-29 13:05
VLAI
EPSS
VEX
Title
Flaw in Linuxulator execution of setugid binaries
Summary
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.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 13:05 UTC
CWE
- CWE-266 - Incorrect Privilege Assignment
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-S… | vendor-advisory |
Impacted products
Date Public
2026-06-09 23:30
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