CVE-2026-68385

CVSS 9.8 (critical) · published 2026-08-10

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().

Weakness: CWE-476

Source: NVD CVE-2026-68385

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

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