CVE-2022-47929

low-risk
Published 2023-01-17

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.

Do I need to act?

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0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (2)

Affected Vendors

Debian Linux

References (14)

Mailing List https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.6
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96...
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
Third Party Advisory https://tldp.org/HOWTO/Traffic-Control-HOWTO/components.html
Third Party Advisory https://www.debian.org/security/2023/dsa-5324
Exploit https://www.spinics.net/lists/netdev/msg555705.html
Mailing List https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.6
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96...
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
Third Party Advisory https://tldp.org/HOWTO/Traffic-Control-HOWTO/components.html
Third Party Advisory https://www.debian.org/security/2023/dsa-5324
Exploit https://www.spinics.net/lists/netdev/msg555705.html
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low