Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-97588
Published: September 28, 2026
Vulnerability identifier: #VU152625
CSH Severity: Low
CVSS v4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97588
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of an exceptional condition in s390 crypto key conversion handling when handling cryptographic key conversion failures. A local user can trigger cryptographic requests requiring key conversion to cause a denial of service.
The condition occurs when hardware persistently returns -EBUSY after key-conversion retries are exhausted and affects callers using crypto_wait_req().
Affected software
Linux kernel
How to mitigate CVE-2026-97588
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3