CVE-2022-47929

Name: CVE-2022-47929
Creator: NVD / NIST
Published: 2023-01-17T21:15:14.59+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.96%

Last modified Jun 17, 2026

CVE-2022-47929 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdisc_graft in net/sched/sch_api.c.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

Description

In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdisc_graft in net/sched/sch_api.c.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.96%

57.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 6.1.6
Debian	Debian Linux	11.0

References

https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.6Mailing List, Patch, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96398560f26aa07e8f2969d73c8197e6a6d10407Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
https://tldp.org/HOWTO/Traffic-Control-HOWTO/components.htmlThird Party Advisory
https://www.debian.org/security/2023/dsa-5324Third Party Advisory
https://www.spinics.net/lists/netdev/msg555705.htmlExploit, Mailing List, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.6Mailing List, Patch, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96398560f26aa07e8f2969d73c8197e6a6d10407Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
https://tldp.org/HOWTO/Traffic-Control-HOWTO/components.htmlThird Party Advisory
https://www.debian.org/security/2023/dsa-5324Third Party Advisory
https://www.spinics.net/lists/netdev/msg555705.htmlExploit, Mailing List, Third Party Advisory

Timeline

Published: Jan 17, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-47929?

How severe is CVE-2022-47929?

CVE-2022-47929 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.

How do I fix CVE-2022-47929?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-47929?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST