Improper privilege management in FreeBSD - CVE-2026-49413
Published: June 11, 2026
Vulnerability identifier: #VU134364
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49413
CWE-ID: CWE-269
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper privilege management in the Linuxulator execution of set-user-ID and set-group-ID Linux binaries when constructing the ELF auxiliary vector during execve(2). A local user can inject a shared library via LD_PRELOAD to escalate privileges.
Only systems with the Linux compatibility module loaded and Linux set-user-ID or set-group-ID executables present are vulnerable.
How to mitigate CVE-2026-49413
Install security update from vendor's website.