SB20260425144 - Improper handling of exceptional conditions in Linux kernel s390 mm
Published: April 25, 2026
Security Bulletin ID
SB20260425144
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-31568)
CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper exception handling in the s390 secure storage access handling for donated memory when accessing donated memory pages in kernel context. A local user can trigger secure storage access exceptions involving donated memory to cause a denial of service.
Remediation
Install update from vendor's website.