CVE-2026-80708s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()
- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 87% 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: Fix missing mem scrub at clear key import in cca_clr2cipherkey() The helper function _ip_cprb_helper() uses internal buffer memory for building and processing CPRBs. After use this buffer was never scrubbed which could lead to leaving for example clear key material in memory which could be exposed via tricky reuse of this same memory. Extend the _ip_cprb_helper() function with another parameter 'scrub' used to steer scrubbing of this buffer. So now the caller has the opportunity to decide if scrubbing is needed or not. Extend the clear key to secure key token import process in function cca_clr2cipherkey() to tell the helper function from above to scrub the cprb buffer when the clear key value is part of the request data. Add explicit scrubbing on return from function cca_clr2cipherkey() for the random EXOR buffer and the cprb buffer. Overall this cleans the internal used buffer in case of clear key import to prevent sensitive data to get exposed.
Timeline
ID reserved
By Linux
- 2 days later
· 2 days later
Published
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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < 8e1c0def77b7450be0ed607ed0d7bae629d30020
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < be7ae07fb745d1cf575b03a178a055b0a2859364
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < 4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < 7dd6e556dbfc91d3d511cfd1015d2dad42608010
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < b453003ae6a869f5bdf025b5519cbb38295ae4f1
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < fbb0410986e8ad214121e51a4a28c3d0a10b7644
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < ebfbb9ac7adbb1e3556100b54a27e8a9b102feac
- affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd – < 01476391aecef36a3b789ee844357b22fbc90665
- affected 5.4
- unaffected < 5.4
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.152 – ≤ 6.6.*
- unaffected 6.12.104 – ≤ 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/8e1c0def77b7450be0ed607ed0d7bae629d30020 (opens in a new tab)
- https://git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364 (opens in a new tab)
- https://git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3 (opens in a new tab)
- https://git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010 (opens in a new tab)
- https://git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1 (opens in a new tab)
- https://git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644 (opens in a new tab)
- https://git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac (opens in a new tab)
- https://git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665 (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-2026-67443 (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-2026-80708)Record last updated .