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Medium severity5.5NVD Advisory· Published Mar 10, 2022· Updated Jun 17, 2026

CVE-2021-4023

CVE-2021-4023

Description

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

4
  • Fedoraproject/Fedora
    cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
  • Linux/Kernel3 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: <=5.14
    • (no CPE)
    • (no CPE)range: <5.15-rc1

Patches

Vulnerability mechanics

References

1

News mentions

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