CVE-2026-89954

8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: This vulnerability allows an attacker to manipulate the footer and region count in an AFS v2 image, potentially leading to kernel crashes or arbitrary code execution.
Exploitability: Exploitation requires control over the flash contents and knowledge of the AFS v2 format. It is moderately difficult to exploit.
Blast radius: If exploited, the vulnerability could impact the stability and security of the system, potentially leading to a complete system compromise.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the latest kernel version 6.1.15 or later.

kernelafsv2crashcode-execution

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.