Out-of-bounds read in Linux kernel - CVE-2026-46055
Published: May 28, 2026
Vulnerability identifier: #VU132430
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46055
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a slab out-of-bounds read in the AppArmor mount path matching logic when handling mount operations. A local user can trigger a mount operation with a non-terminated string to cause a denial of service.
The issue was observed in aa_dfa_match during AppArmor mount mediation on ARM64 systems.
How to mitigate CVE-2026-46055
Install security update from vendor's repository.