CVE-2026-74466s390/zcrypt: Close speculative mem read possibility
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cfd68b33094e1a92249850ff3c3c92ae9112a541 before 59adeedebf02aa1c203de1d2b67ec45bfab7a3c6; from cfd68b33094e1a92249850ff3c3c92ae9112a541 before 82b62eda68abfb7a33ac40f24b8c4128c2891148; from cfd68b33094e1a92249850ff3c3c92ae9112a541 before e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb | CNA record |
References
- https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6
- https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148
- https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.