Deadlock in Linux kernel - CVE-2026-92503
Published: September 18, 2026
Vulnerability identifier: #VU151020
CSH Severity: Low
CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92503
CWE-ID: CWE-833
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an ABBA deadlock in ext4_xattr_inode_cache_find() when concurrently exercising extended-attribute workloads. A local user can issue concurrent extended-attribute operations to cause a denial of service.
The issue occurs when the ea_inode mount/format option is in use.
Affected software
Linux kernel
How to mitigate CVE-2026-92503
Install security update from vendor's repository.