Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-97591
Published: October 4, 2026
Vulnerability identifier: #VU153236
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97591
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause incorrect handling of PHMAC hash requests.
The vulnerability exists due to improper handling of an exceptional return code in PHMAC crypto request handling when a hash request transferred to the crypto engine returns EBUSY. A local user can submit a PHMAC hash request that is transferred to the crypto engine to cause incorrect handling of PHMAC hash requests.
Affected software
Linux kernel
How to mitigate CVE-2026-97591
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3