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Vulnerabilities CVE-2026-68385

CVE-2026-68385

Critical
Open
TLP:CLEAR

s390/checksum: Fix csum_partial() without vector facility

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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().

Details

CVSS Score
9.8
EPSS Score
0.18%

7.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Aug 10, 2026
Last Modified
Aug 13, 2026
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