Insufficient Logging in Linux kernel - CVE-2026-53367

Vulnerability identifier: #VU138898

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-53367

CWE-ID: CWE-778

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass security auditing.

The vulnerability exists due to improper audit logging in the SELinux per-task avdcache when handling inode permission checks. A local user can trigger cached permission checks to bypass security auditing.

Some permission checks may not be audited after a previously cached check for different permissions on the same directory entry.

Linux kernel
Ubuntu
linux-ibm (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

• https://git.kernel.org/stable/c/bce6a32bc888dfebb6a7d4dee454228b71ed8369
• https://git.kernel.org/stable/c/e3e722ea88e051ae5361dc540c01ba18f87b5ffd
• https://git.kernel.org/stable/c/f92d542577db878acfd21cc18dab23d03023b217

• Insufficient Logging in Linux kernel selinux include
• Ubuntu update for linux-ibm
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-nvidia