CVE-2026-89954

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/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