CVE-2026-89954

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < 1bec05a68414cf8d0cab6cb42445b8603f32ffc4affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < 3ad8ff12fd44b08af9212ac4883a7e29d2ab7348affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < 875daa3c750814ff2e2dc050239c390048f0bcd0affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < da740539e8f370767317e24615349b9342a6e773affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < 1edea8900ca3e405c1421d8b5c29f97107874f72affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < 18916f475057cbd2fb8ea6ae86e6b85884ad1d53affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < d14e6298139f58a87a87d7022e26a7f37f0ddce7affected
LinuxLinuxb7cf5e2830bbb128699d7635ce8404b7f605bc95 < e9290031f736e99ad17c25c00311c92c266843b7affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References