Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csum_partial() calls csum_copy() with copy=false and dst=NULL. On machines without the vector facility, csum_copy() falls back to cksm(dst, ...), causing the checksum to be calculated from address zero instead of the source buffer. The VX implementation already checksums data loaded from src. Make the fallback do the same by passing src to cksm().
CVSS Score
CRITICAL
References
- https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722
- https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa
- https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261
- https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a
FAQ
What is CVE-2026-68385?
CVE-2026-68385 is a vulnerability with a CVSS score of 9.8 (CRITICAL). In the Linux kernel, the following vulnerability has been resolved: s390/checksum: Fix csum_partial() without vector facility Currently csum_partial() calls csum_copy() with copy=false and dst=NULL....
How severe is CVE-2026-68385?
CVE-2026-68385 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-68385?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.