SB20260625133 - Out-of-bounds read in Linux kernel integrity ima

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-53038)

CWE-ID: CWE-125 - Out-of-bounds read

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 an out-of-bounds read in create_securityfs_measurement_lists in the IMA securityfs measurement list creation logic when processing TPM banks with unsupported hash algorithms. A local user can trigger initialization on a system with a TPM that reports an unsupported bank algorithm to cause a denial of service.

The issue is triggered during IMA initialization when a TPM bank algorithm is left as HASH_ALGO__LAST and then used as an index into hash_algo_name[].

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/081b557cb56e1cfa8d1619b2601b01c53e3f418c
• https://git.kernel.org/stable/c/88d4e89a39f0de07798ca3fd93bd1a9ea212a82e
• https://git.kernel.org/stable/c/b6766b171a5c4c33b26ff6fec530cb798db1f75e
• https://git.kernel.org/stable/c/d7bd8cf0b348d3edae7bee33e74a32b21668b181