CVE-2021-22600

linux: A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted sys...

CVE-2021-22600 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2021-22600, released January 26, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on April 11, 2022. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

7.8

high

Exploitation

Exploited

Listed by CISA

CISA KEV

Apr 11, 2022

Federal due date May 2, 2022

EPSS

0.0659

93rd percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Linux
kernel-uek · ol 8	0:5.4.17-2136.306.1.3.el8uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-container · ol 8	0:5.4.17-2136.306.1.3.el8	ELSA-2022-9274	Apr 11, 2022
kernel-uek-container-debug · ol 8	0:5.4.17-2136.306.1.3.el8	ELSA-2022-9274	Apr 11, 2022
kernel-uek-debug · ol 8	0:5.4.17-2136.306.1.3.el8uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-debug-devel · ol 8	0:5.4.17-2136.306.1.3.el8uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-devel · ol 8	0:5.4.17-2136.306.1.3.el8uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-doc · ol 8	0:5.4.17-2136.306.1.3.el8uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-tools · ol 8	0:5.4.17-2136.306.1.3.el7uek	ELSA-2022-9273	Apr 11, 2022
kernel-uek-tools-libs · ol 8	0:5.4.17-2136.306.1.3.el7uek	ELSA-2022-9273	Apr 11, 2022
linux · Debian 12.15 (bookworm)	5.15.15-1	DEBIAN-CVE-2021-22600	Jan 26, 2022
linux · Debian 13.5 (trixie)	5.15.15-1	DEBIAN-CVE-2021-22600	Jan 26, 2022
linux · Debian 14	5.15.15-1	DEBIAN-CVE-2021-22600	Jan 26, 2022
perf · ol 8	0:5.4.17-2136.306.1.3.el7uek	ELSA-2022-9273	Apr 11, 2022
python-perf · ol 8	0:5.4.17-2136.306.1.3.el7uek	ELSA-2022-9273	Apr 11, 2022

Details

Published
January 26, 2022
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA required action
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