CVE-2022-33743

Name: CVE-2022-33743
Creator: NVD / NIST
Published: 2022-07-05T13:15:08.613+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2022-33743 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

Description

network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.34%

26.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.9, <= 5.18
Xen	Xen	All versions
Debian	Debian Linux	11.0

References

http://www.openwall.com/lists/oss-security/2022/07/05/5Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-405.htmlPatch, Vendor Advisory
https://www.debian.org/security/2022/dsa-5191Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-405.txtVendor Advisory
http://www.openwall.com/lists/oss-security/2022/07/05/5Mailing List, Patch, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-405.htmlPatch, Vendor Advisory
https://www.debian.org/security/2022/dsa-5191Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-405.txtVendor Advisory

Timeline

Published: Jul 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33743?

How severe is CVE-2022-33743?

CVE-2022-33743 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33743?

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-2022-33743?

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

Scan your code now

Source: NVD / NIST