Unchecked Return Value in Linux kernel - CVE-2026-97488
Published: September 24, 2026
Vulnerability identifier: #VU151997
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97488
CWE-ID: CWE-252
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to an unchecked return value in qnx4_fill_super when mounting a QNX4 filesystem on a device whose block size causes sb_set_blocksize to fail. A local privileged user can mount the filesystem to trigger a kernel BUG.
Affected software
Linux kernel
How to mitigate CVE-2026-97488
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3