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CVE-2022-2938 is a use-after-free vulnerability in the Linux kernel Pressure Stall Information (PSI) subsystem. The flaw occurs when a PSI trigger is destroyed while a polling operation is still using it. A local attacker able to register a PSI trigger and wait on it through poll() can cause the stale object to be accessed in kernel context. PSI is disabled by default on configurations using CONFIG_PSI_DEFAULT_DISABLED and is affected only when explicitly enabled at boot.
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Linux kernel use-after-free condition when a PSI trigger is destroyed during polling.
Linux kernel PSI trigger use-after-free when a trigger is destroyed during polling.
Linux kernel pressure-stall-information trigger use-after-free vulnerability.
A Linux kernel use-after-free vulnerability in the Pressure Stall Information (PSI) subsystem. It can be triggered by a local attacker who registers a PSI trigger and polls it while the trigger is destroyed, potentially causing unknown kernel-space effects. Systems are affected only when PSI is enabled with the psi=1 boot parameter.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.