Use-after-free in Linux kernel - CVE-2026-90204
Published: September 19, 2026
Vulnerability identifier: #VU151278
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90204
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a use-after-free error.
The vulnerability exists due to improper validation in the OCFS2 dinode validator when processing a corrupted append-DIO dinode during inode read. A local user can cause DIO orphan recovery to use an out-of-range orphaned-slot value to trigger a use-after-free error.
Affected software
Linux kernel
How to mitigate CVE-2026-90204
Install security update from vendor's repository.