Out-of-bounds read in Linux kernel - CVE-2026-90321
Published: September 18, 2026
Vulnerability identifier: #VU151156
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90321
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger an out-of-bounds read.
The vulnerability exists due to insufficient bounds checking in OCFS2 inline extended-attribute metadata when accessing an inode with corrupted inline extended attributes. A local user can invoke getxattr() or listxattr() on the affected inode to trigger an out-of-bounds read.
Affected software
Linux kernel
How to mitigate CVE-2026-90321
Install security update from vendor's repository.