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CVE-2026-52991 is a race condition in the Linux kernel pressure stall information (sched/psi) component involving pressure_write() and cgroup_file_release(). Access to the priv member of struct kernfs_open_file is not fully protected by cgroup_mutex. During concurrent cgroup removal, file release can free the context after pressure_write() retrieves its pointer, causing a use-after-free when the write operation accesses the context. A related race involving concurrent disabling of cgroup pressure reporting can clear the pointer while pressure_write() waits for the mutex, resulting in a NULL pointer dereference. These conditions can cause kernel memory corruption, crashes, or denial of service.
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29 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A race condition between file release and pressure writes in the Linux kernel scheduler's pressure-stall information subsystem.
A vulnerability covered by the Miracle Linux kernel package update. Individual technical details and exploit availability are not specified.
A vulnerability referenced by the Miracle Linux AXSA-2026-1779 security update; no technical vulnerability details are supplied in the content.
A vulnerability addressed by the AlmaLinux 9 kernel update; no vulnerability-specific technical details are supplied.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.