PatchTheCVECVE-2026-52991: In the Linux kernel, the following vulnerability has been resolved: sched/psi: fix race between file release
CVE-2026-52991 is a high-severity flaw (CVSS 7.8) affecting linux kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In the Linux kernel, the following vulnerability has been resolved: sched/psi: fix race between file release and pressure write A potential race condition exists between pressure write and cgroup file release regarding the priv member of struct kernfs_open_file, which triggers the uaf reported in [1]. Consider the following scenario involving execution on two separate CPUs: CPU0 CPU1 ==== ==== vfs_rmdir() kernfs_iop_rm
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-52991?
linux kernel: upgrade to 6.18.33, 7.0.10. Exact commands for each OS are on this page.
Is CVE-2026-52991 being exploited?
CVE-2026-52991 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-52991 affect?
CVE-2026-52991 affects linux kernel. Severity is high (CVSS 7.8). In the Linux kernel, the following vulnerability has been resolved: sched/psi: fix race between file release and pressure write A potential race condition exists between pressure write and cgroup file release regarding the priv member of
How urgent is CVE-2026-52991?
Priority 33/100. High severity; On your watchlist
Software pages
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