CVE-2026-97489
kernel: bfs: handle set_blocksize failures
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 24, 2026
Updated · September 30, 2026
Description
A flaw was found in the Linux kernel's BFS (Boot File System) implementation. The kernel fails to properly verify the return value when setting the block size during a mount operation. A local user with permissions to mount file systems could exploit this issue by mounting an incompatible file system image, causing a kernel crash and resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion