CVE-2021-22600

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.066 · 94 %ileexploit · PoCEURUUS
grimoire priorityP0 · Act now
Exploitable?
Yes · in the wild
CISA KEV · 2 exploits · PoC
Likely / severe?
6.59% (94th) EPSS
CVSS 7.2 · high
Is it mine?
35 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · osv

added 2022-04-11remediate by 2022-05-02

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-26

Linux Kernel Privilege Escalation Vulnerability

A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755

01

cvss

Technical severity, 0–10. One row per scoring source.

8.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.8

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10
v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1 · impact 5.9
v3.18.8highAV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.16.6mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:Hsecondary · ENISA EU
v3.16.6mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:Hsecondary · cve-coordination@google.comexploitability 0.8 · impact 5.3
v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-415USprimaryCWE-415US
04

exploits (2)

Public proof-of-concept and weaponised exploit code.

05

affected products (35)

Products and version ranges known to be affected.

showing 20 of 35
06

advisories (2)

Vendor and ecosystem advisories describing this.

  • ASB-A-2134640342022-05-01vendor · osvUS

    In packet_set_ring of af_packet.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

  • PUB-A-2134640342022-03-01vendor · osvUS

    In packet_set_ring of af_packet.c, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

07

also known as (7)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvnvdNVDCVE.orgMITRE
published 2022-01-26modified 2026-06-17
10

references (27)

External citations — patches, advisories, analysis.

scry

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