CVE-2026-89954

high

Description

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://git.kernel.org/stable/c/e9290031f736e99ad17c25c00311c92c266843b7

https://git.kernel.org/stable/c/da740539e8f370767317e24615349b9342a6e773

https://git.kernel.org/stable/c/d14e6298139f58a87a87d7022e26a7f37f0ddce7

https://git.kernel.org/stable/c/875daa3c750814ff2e2dc050239c390048f0bcd0

https://git.kernel.org/stable/c/3ad8ff12fd44b08af9212ac4883a7e29d2ab7348

https://git.kernel.org/stable/c/1edea8900ca3e405c1421d8b5c29f97107874f72

https://git.kernel.org/stable/c/1bec05a68414cf8d0cab6cb42445b8603f32ffc4

https://git.kernel.org/stable/c/18916f475057cbd2fb8ea6ae86e6b85884ad1d53

Details

Source: Mitre, NVD

Published: 2026-09-16

Updated: 2026-09-16

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:P/A:C

Severity: Medium

CVSS v3

Base Score: 8

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Severity: High

EPSS

EPSS: 0.0018