CVE-2021-22600

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

Description

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

Category

6.6
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
KEV Since 
Vendor Advisory debian.org
Affected: Linux Kernel Kernel
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=ec6af094ea28f0f2dda1a6a33b14cd57e36a9755 mailing list patch
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html third party advisory mailing list
https://www.debian.org/security/2022/dsa-5096 third party advisory vendor advisory
https://security.netapp.com/advisory/ntap-20230110-0002/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-22600?
CVE-2021-22600 has been scored as a medium severity vulnerability.
How to fix CVE-2021-22600?
To fix CVE-2021-22600, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22600 being actively exploited in the wild?
It is confirmed that CVE-2021-22600 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22600?
CVE-2021-22600 affects Linux Kernel Kernel.
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