CVE-2021-4023

5.5 mediumEPSS 0.2%

Medium (5.5). EPSS 0.2% chance of exploitation in the next 30 days.

A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5.15-rc1. The kernel can panic when an improper cancellation operation triggers the submission of new io-uring operations during a shortage of free space. This flaw allows a local user with permissions to execute io-uring requests to possibly crash the system.

Severity

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-31)
CWE: CWE-200
Published: 2022-03-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

fedoraproject:fedora
linux:linux_kernel

References

https://bugzilla.redhat.com/show_bug.cgi?id=2026484
https://bugzilla.redhat.com/show_bug.cgi?id=2026484

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