CVE-2026-68385s390/checksum: Fix csum_partial() without vector facility
- 9.8CriticalCVSS base score
- 0.49%Exploitation in 30 daysEPSS · top 57% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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().
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.49% · top 57% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 – < 5fc0a2a6eeb99cac991242bb48796c7749ce3261
- affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 – < 1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722
- affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 – < 898bb2814f38399108bdd2113f38d97383a7036a
- affected dcd3e1de9d17dc43dfed87a9fc814b9dec508043 – < 4bb06b60d982355e22647b3d12d6619419f8c1fa
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/5fc0a2a6eeb99cac991242bb48796c7749ce3261 (opens in a new tab)
- https://git.kernel.org/stable/c/1d9a2f01b3c4e5c88e06b2db4b5460c2ec884722 (opens in a new tab)
- https://git.kernel.org/stable/c/898bb2814f38399108bdd2113f38d97383a7036a (opens in a new tab)
- https://git.kernel.org/stable/c/4bb06b60d982355e22647b3d12d6619419f8c1fa (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55571 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68385)Record last updated .