PT-2025-8109 · Linux · Linux Kernel
Published
2025-02-26
·
Updated
2025-03-03
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CVE-2022-49181
None
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Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.16.13-2.fc32.qubes.x86 64
Description
A vulnerability in the Linux kernel has been identified, related to the Xen PMU initialization. The issue arises from the
is xen pmu() function, which checks the Xen PMU initialization state on the current CPU. However, this function does not properly handle preemption, leading to potential issues when resuming from suspend. The problem is resolved by replacing is xen pmu() with a simple boolean variable that reflects the Xen PMU initialization state on CPU 0.Recommendations
For Linux kernel versions prior to 5.16.13-2.fc32.qubes.x86 64, modify the
xen pmu init() function to return early if it is being called for a CPU other than CPU 0 and the boolean variable is not set. Additionally, replace the is xen pmu() function with a simple boolean variable to reflect the Xen PMU initialization state on CPU 0. Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Linux Kernel