CVE-2022-3586

Name: CVE-2022-3586
Creator: NVD / NIST
Published: 2022-10-19T18:15:13.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2022-3586 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

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.

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

0.45%

35.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	>= 2.6.39, <= 5.19	—
Linux	Linux Kernel	6.0	Rc1
Debian	Debian Linux	10.0	—

References

https://github.com/torvalds/linux/commit/9efd23297ccaPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing List, Third Party Advisory
https://www.zerodayinitiative.com/advisories/upcoming/Third Party Advisory, VDB Entry
https://github.com/torvalds/linux/commit/9efd23297ccaPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlMailing List, Third Party Advisory
https://www.zerodayinitiative.com/advisories/upcoming/Third Party Advisory, VDB Entry

Timeline

Published: Oct 19, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-3586?

How severe is CVE-2022-3586?

CVE-2022-3586 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2022-3586?

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-2022-3586?

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

Scan your code now

Source: NVD / NIST