Improper input validation in Linux kernel - CVE-2026-72160

Vulnerability identifier: #VU143438

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2026-72160

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in ocfs2_validate_inode_block() and ocfs2_filecheck_validate_inode_block() when processing forged OCFS2 inode metadata. A local user can provide a crafted dinode with non-canonical i_mode type bits to cause a denial of service.

The issue affects the normal read path and the online filecheck read path.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1036.39+1
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• https://git.kernel.org/stable/c/157d31ef45038d89cd19620105e082d43c8e41e0
• https://git.kernel.org/stable/c/2e3aac33988ef4e4170141db8e995693ea38357c
• https://git.kernel.org/stable/c/4db3b6a2a8ecf2a89d26a4090ace4072c6fad050
• https://git.kernel.org/stable/c/5366a017099c6a3c443be908a05f26fd72af12a1
• https://git.kernel.org/stable/c/82afe13558354390d8a592a5334d5f4fd72c0e5c
• https://git.kernel.org/stable/c/a5b555bcabbb0aff8745ad181768eaf9d964c1ee
• https://git.kernel.org/stable/c/b858f2d57cfc9d57ce61b86051d603dc0ebccd40
• https://git.kernel.org/stable/c/fb024ea29f6cb1f01745e5f2e31646f3acb9aa6f

• Improper input validation in Linux kernel ocfs2
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux-nvidia-tegra
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0