What is CVE-2022-3586?

CVE-2022-3586 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2022-3586 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-3586?

CVE-2022-3586 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2022-3586?

No patch is currently available for CVE-2022-3586. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2022-3586 actively exploited?

CVE-2022-3586 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2022-3586

Medium

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.

Package Linux Kernel

Published 2022-10-19

Last modified 2025-06-25

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2022-3586 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2022-3586 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

Mailing List Third Party Advisory
Zerodayinitiative
https://www.zerodayinitiative.com/advisories/upcoming/

Third Party Advisory VDB Entry
Kernel patch commit
https://github.com/torvalds/linux/commit/9efd23297cca
Patch

Details

CVE ID CVE-2022-3586

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2022-10-19

Modified 2025-06-25

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2022-3586?

CVE-2022-3586 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2022-3586 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-3586?

CVE-2022-3586 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2022-3586?

No patch is currently available for CVE-2022-3586. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2022-3586 actively exploited?

No — CVE-2022-3586 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →