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CVE-2026-89954

HIGHCVSS 8/10

Last modified

CVE-2026-89954 is a high-severity vulnerability rated 8/10 on the CVSS scale. 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..

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.

Metrics

CVSS 3.1
8/10

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

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < 1bec05a68414cf8d0cab6cb42445b8603f32ffc4; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < 3ad8ff12fd44b08af9212ac4883a7e29d2ab7348; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < 875daa3c750814ff2e2dc050239c390048f0bcd0; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < da740539e8f370767317e24615349b9342a6e773; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < 1edea8900ca3e405c1421d8b5c29f97107874f72; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < 18916f475057cbd2fb8ea6ae86e6b85884ad1d53; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < d14e6298139f58a87a87d7022e26a7f37f0ddce7; >= b7cf5e2830bbb128699d7635ce8404b7f605bc95, < e9290031f736e99ad17c25c00311c92c266843b7
LinuxLinux5.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89954?
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.
How severe is CVE-2026-89954?
CVE-2026-89954 has a CVSS score of 8/10 (HIGH severity).
How do I fix CVE-2026-89954?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST