CVE-2021-22600Actively exploitedAdded to KEV 2022-04-11

Linux Kernel Privilege Escalation Vulnerability

Linux, Kernel

Description

Linux Kernel contains a flaw in the packet socket (AF_PACKET) implementation which could lead to incorrectly freeing memory. A local user could exploit this for denial-of-service (DoS) or possibly for privilege escalation.

CVSS severity for this advisory hasn't been enriched from NVD yet, check back shortly.

EPSS, exploit probability

Medium

6.6%

estimated chance of real-world exploitation in the next 30 days, higher than 93.8% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Required action

Apply updates per vendor instructions.

CISA-recommended due date: 2022-05-02

CWE-415

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