CVE-2023-52859: perf: hisi: Fix use-after-free when register pmu fails

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: 2024-05-21 · updated 2026-06-17
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: perf: hisi: Fix use-after-free when register pmu fails When we fail to register the uncore pmu, the pmu context may not been allocated. The error handing will call cpuhp_state_remove_instance() to call uncore pmu offline callback, which migrate the pmu context. Since that's liable to lead to some kind of use-after-free. Use cpuhp_state_remove_instance_nocalls() instead of cpuhp_state_remove_instance() so that the notifiers don't execute after the PMU device has been failed to register.

Affected products

Linux kernel: from 5.13 before 5.15.139; from 5.16 before 6.1.63; from 6.2 before 6.5.12; from 6.6 before 6.6.2 — fixed in 5.15.139, 6.1.63, 6.5.12, 6.6.2

How to fix

Upgrade to a fixed version: Linux kernel 5.15.139, 6.1.63, 6.5.12, 6.6.2. Check the vendor advisory for mitigations.

References

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