Flaw in Linuxulator execution of setugid binaries
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.1epss 0.1%
from disclosure to weapon0 days
Published on NVDJun 27
1st PoCJun 10
exploitation probability
0.1%top 95% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Affected products
FreeBSD · FreeBSDpublic PoCs found — 1
githubgithub.com/ii4gsp/CVE-2026-49413★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.