SB20260425169 - Inclusion of Sensitive Information in Log Files in Linux kernel read_key_from_user_keying()

Description

This security bulletin contains information about 1 vulnerability.

1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2026-31543)

CWE-ID: CWE-532 - Information Exposure Through Log Files

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

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to insertion of sensitive information into log files in read_key_from_user_keying() when debug logging is enabled while processing key payloads. A local user can trigger key handling to disclose sensitive information.

Only the first 8 bytes of the dm-crypt key payload are exposed, and only when debug logging is enabled.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/36f46b0e36892eba08978eef7502ff3c94ddba77
• https://git.kernel.org/stable/c/4897bd307ba8757c31a3325ba6730961be606016
• https://git.kernel.org/stable/c/ed8d91f469845d62d44c565a55d2ab1767969357