Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-72067

Vulnerability identifier: #VU143524

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-2026-72067

CWE-ID: CWE-703

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 error handling in cpuhp_invoke_callback() when unwinding earlier callbacks for the same hotplug state after an instance callback failure. A local user can trigger a CPU hotplug state transition failure to cause a denial of service.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (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-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-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

• https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5
• https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905
• https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b
• https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb
• https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80
• https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338
• https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6
• https://git.kernel.org/stable/c/fe9c8d641f6991614d1229a3ffd3e33b879bba9c

• Improper Check or Handling of Exceptional Conditions in Linux kernel cpuhp_invoke_callback()
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0