SB20260528232 - Stack-based buffer overflow in Linux kernel integrity ima

Description

This security bulletin contains information about 1 vulnerability.

1) Stack-based buffer overflow (CVE-ID: CVE-2025-71306)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a stack-based buffer overflow in is_bprm_creds_for_exec() when handling IMA appraisal during exec-related measurement processing. A local user can trigger the vulnerable code path to cause a denial of service.

The issue was observed as a stack out-of-bounds read in ima_appraise_measurement caused by using container_of on the file pointer.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/377cae9851e8559e9d8b82a78c1ac0abeb18839c
• https://git.kernel.org/stable/c/ab3d16da982a4ebb715d487dbf9dd66e3990d935