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CVE record · CVE-2021-22600

Double Free in net/packet/af_packet.c leading to priviledge escalation

CVSS 6.6 MediumCriticalIn CISA KEVEPSS 0.066 · 93rd percentile

Critical, because:

  • In CISA’s KEV catalogue since 11 Apr 2022: it is known to be exploited.

How we decide what’s critical

Published by the CVE Program (CNA: Google) at 26 Jan 2022, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Linux Kernel Kernel
  • affected unspecified to before 5.4.168 custom
  • affected unspecified to before 5.10.88 custom
  • affected unspecified to before 5.15.11 custom
  • affected unspecified to before 5.16-rc6 custom
Identifiers
CVE-2021-22600
CNA
Google
Weakness (CWE)
CWE-415
Tags
Published
26 Jan 2022
Updated
21 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.6 Medium 3.1 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H CNA (Google)
  • CISA KEV Listed since 11 Apr 2022: known to be exploited.
  • EPSS 0.066, the 93rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 26 Jan 2022. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.