Use After Free in Linux Kernel
CVE-2022-3586
A flaw was found in the Linux kernel’s networking code. A use-after-free was found in the way the sch_sfb enqueue function used the socket buffer (SKB) cb field after the same SKB had been enqueued (and freed) into a child qdisc. This flaw allows a local, unprivileged user to crash the system, causing a denial of service.
Vulnerability class: Use-After-Free
EPSS: 0.004 (36.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel — versions 6.0
- Debian Debian_linux — versions 10.0
- N/a Linux Kernel — versions Fixed in kernel v6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory)
- secalert@redhat.com (VDB Entry, Third Party Advisory)
- secalert@redhat.com (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-3586?
- CVE-2022-3586 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 5.5/10. Published 2022-10-19.
- How severe is CVE-2022-3586?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2022-3586 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.