CVE-2026-49413

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 v3.1

7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS

0.13% chance of exploitation in the next 30 days, 3th percentile

Published

2026-06-27

Updated

2026-06-29

Proof-of-concept exploits (1)

• ii4gsp/CVE-2026-494130★ · 2026-06-10

References

• CVE Record
• NVD entry

Related

• CVE-2020-27786
• CVE-2026-1457
• CVE-2026-49411
• CVE-2026-49417
• CVE-2026-49406
• CVE-2026-49440