Vulnerabilities > CVE-2022-47929 - NULL Pointer Dereference vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=96398560f26aa07e8f2969d73c8197e6a6d10407
- https://tldp.org/HOWTO/Traffic-Control-HOWTO/components.html
- https://www.spinics.net/lists/netdev/msg555705.html
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.6
- https://www.debian.org/security/2023/dsa-5324
- https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html