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().

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
dcd3e1de9d17dc43dfed87a9fc814b9dec508043 affected < 5fc0a2a6eeb99cac991242bb48796c7749ce3261
dcd3e1de9d17dc43dfed87a9fc814b9dec508043 affected < 1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722
dcd3e1de9d17dc43dfed87a9fc814b9dec508043 affected < 898bb2814f38399108bdd2113f38d97383a7036a
dcd3e1de9d17dc43dfed87a9fc814b9dec508043 affected < 4bb06b60d982355e22647b3d12d6619419f8c1fa
Linux Linux affected
Version Status Constraints
6.9 affected —
0 unaffected < 6.9
6.12.101 unaffected ≤ 6.12.*
6.18.42 unaffected ≤ 6.18.*
7.1.6 unaffected ≤ 7.1.*
7.2-rc4 unaffected ≤ *

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Fixes

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References
Link Providers
https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722 cve-icon
https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa cve-icon
https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261 cve-icon
https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a cve-icon
History

Mon, 10 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Mon, 10 Aug 2026 12:30:00 +0000

Type Values Removed Values Added
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().
Title s390/checksum: Fix csum_partial() without vector facility
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-10T12:04:04.281Z

Reserved: 2026-07-30T09:28:09.387Z

Link: CVE-2026-68385

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

Updated: 2026-08-10T18:15:11Z

Weaknesses