# CVE-2026-74466: linux: In the Linux kernel, the following vulnerability has been resolved:  s390/zcrypt: Close speculative mem read possibil...

CVE-2026-74466 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-74466, released August 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-74466
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-74466](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74466.md) | Aug 16, 2026 |
| Linux | linux Debian 14 | 7.1.8-1 | [DEBIAN-CVE-2026-74466](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74466.md) | Aug 16, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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