CVE-2026-74466s390/zcrypt: Close speculative mem read possibility
- —Not scoredno CVSS score yet
- 0.19%Exploitation in 30 daysEPSS · top 92% 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: Close speculative mem read possibility The domain value is extracted from a given CCA or EP11 ioctl struct when a CPRB is about to be sent. Thus this is a user controlled value. Under some special conditions (custom device node used, administrative load) this value is used as an array index after bounds checking, but without speculation barrier. Add the missing array_index_nospec() call to prevent speculative execution where this domain value is used.
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.19% · top 92% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < 55ac533c568a5dcaa41cd26d6e089f9dff2a7c22
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < dd1a334523ba533cba63caf593a7329d8e0e5e6e
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < 59adeedebf02aa1c203de1d2b67ec45bfab7a3c6
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < 82b62eda68abfb7a33ac40f24b8c4128c2891148
- affected cfd68b33094e1a92249850ff3c3c92ae9112a541 – < e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb
- affected 5.18
- unaffected < 5.18
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/55ac533c568a5dcaa41cd26d6e089f9dff2a7c22 (opens in a new tab)
- https://git.kernel.org/stable/c/dd1a334523ba533cba63caf593a7329d8e0e5e6e (opens in a new tab)
- https://git.kernel.org/stable/c/d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f (opens in a new tab)
- https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6 (opens in a new tab)
- https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148 (opens in a new tab)
- https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb (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-2026-59659 (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-2026-74466)Record last updated .