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CVE-2026-68385

s390/checksum: Fix csum_partial() without vector facility PUBLISHED

Description (CNA)

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().

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 before 5fc0a2a6eeb99cac991242bb48796c7749ce3261; affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 before 1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722; affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 before 898bb2814f38399108bdd2113f38d97383a7036a; affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 before 4bb06b60d982355e22647b3d12d6619419f8c1fa
Linux / Linuxaffected 6.9; unaffected 0 before 6.9; unaffected 6.12.101 through 6.12.*; unaffected 6.18.42 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.