SB20260812144 - Incorrect Comparison in Linux kernel s390 lib
Published: August 12, 2026
Security Bulletin ID
SB20260812144
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) Incorrect Comparison (CVE-ID: CVE-2026-68385)
CWE-ID: CWE-697 - Incorrect Comparison
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 incorrect buffer selection in csum_partial() fallback logic in arch/s390/lib/csum-partial.c when calculating checksums on machines without the vector facility. A local user can trigger checksum calculation to cause a denial of service.
Only s390 systems without the vector facility are affected.
Remediation
Install update from vendor's website.