What’s Vulnerable › Vulnerabilities

CVE-2026-72067: cpu: hotplug: Preserve per instance callback errors

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-19
• Weakness: CWE-754

Description

In the Linux kernel, the following vulnerability has been resolved: cpu: hotplug: Preserve per instance callback errors cpuhp_invoke_callback() unwinds earlier callbacks for the same hotplug state when one instance fails. The rollback path currently reuses ret, so a successful rollback can hide the original error and make the failed transition look successful. Keep the rollback result separate from the original error.

Affected products

• Linux kernel: 4.14 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• 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

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