CVE-2026-68451s390/zcrypt: Validate length for CCA ECC private key requests
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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/zcrypt: Validate length for CCA ECC private key requests cca_ecc2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject the request early if the token length exceeds the available space in the parameter block.
Timeline
ID reserved
By Linux
- 14 days later
· 14 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < 7dc306ff7c4d951582adaae65e0aee9fb4968dbe
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < 447a37a6bef11bfd3645069e380460b11386e2b9
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < f0831f13c42c1261d449dcee8a035e1c6cd9fcaa
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < 013a4484f061a2b41f052e25c0015203287e63f1
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < 8fa3e9435a13c335efb63fb4f4e77531a0031159
- affected fa6999e326fe7851ecbd572b8cb9be8e930ebf41 – < a9ae0f6dd45c3ccc1d69363f7aea8af179122730
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.103 – ≤ 6.12.*
- unaffected 6.18.44 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/7dc306ff7c4d951582adaae65e0aee9fb4968dbe (opens in a new tab)
- https://git.kernel.org/stable/c/447a37a6bef11bfd3645069e380460b11386e2b9 (opens in a new tab)
- https://git.kernel.org/stable/c/f0831f13c42c1261d449dcee8a035e1c6cd9fcaa (opens in a new tab)
- https://git.kernel.org/stable/c/dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e (opens in a new tab)
- https://git.kernel.org/stable/c/ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5 (opens in a new tab)
- https://git.kernel.org/stable/c/013a4484f061a2b41f052e25c0015203287e63f1 (opens in a new tab)
- https://git.kernel.org/stable/c/8fa3e9435a13c335efb63fb4f4e77531a0031159 (opens in a new tab)
- https://git.kernel.org/stable/c/a9ae0f6dd45c3ccc1d69363f7aea8af179122730 (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-2026-57920 (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-2026-68451)Record last updated .