CVE-2026-89954 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20507133
- published5 Oct 2026
- disclosed16 Sept 2026
Introduced: 16 Sep 2026
NewCVE-2026-89954 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
mtd: afs: validate v2 image info bounds
The AFS v2 parser uses footer[8] to locate the image information block inside the current erase block, then uses the image information region_count to walk entries from a fixed local array. The footer offset and region count come from flash contents and are not checked against the erase block or the local image-info array before use.
Reject v2 entries whose image information offset would underflow the erase block calculation, and reject region counts that cannot fit in the local image-info array before walking region entries.
References
- https://security-tracker.debian.org/tracker/CVE-2026-89954
- https://git.kernel.org/stable/c/18916f475057cbd2fb8ea6ae86e6b85884ad1d53
- https://git.kernel.org/stable/c/1bec05a68414cf8d0cab6cb42445b8603f32ffc4
- https://git.kernel.org/stable/c/1edea8900ca3e405c1421d8b5c29f97107874f72
- https://git.kernel.org/stable/c/3ad8ff12fd44b08af9212ac4883a7e29d2ab7348
- https://git.kernel.org/stable/c/875daa3c750814ff2e2dc050239c390048f0bcd0
- https://git.kernel.org/stable/c/d14e6298139f58a87a87d7022e26a7f37f0ddce7
- https://git.kernel.org/stable/c/da740539e8f370767317e24615349b9342a6e773
- https://git.kernel.org/stable/c/e9290031f736e99ad17c25c00311c92c266843b7