CVE-2022-0934

Name: CVE-2022-0934
Creator: NVD / NIST
Published: 2022-08-29T15:15:10.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.43%

Last modified Jun 17, 2026

CVE-2022-0934 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.. EPSS estimates a 1.43% chance of exploitation in the next 30 days.

Description

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.43%

69.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Thekelleys	Dnsmasq	< 2.87
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0

References

https://access.redhat.com/security/cve/CVE-2022-0934Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2057075Issue Tracking, Patch, Third Party Advisory
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016272.htmlMailing List, Vendor Advisory
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=03345ecefeb0d82e3c3a4c28f27c3554f0611b39Broken Link
https://access.redhat.com/security/cve/CVE-2022-0934Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2057075Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00035.html
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q1/016272.htmlMailing List, Vendor Advisory
https://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commit%3Bh=03345ecefeb0d82e3c3a4c28f27c3554f0611b39Broken Link

Timeline

Published: Aug 29, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-0934?

A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who sends a crafted packet processed by dnsmasq, potentially causing a denial of service.

How severe is CVE-2022-0934?

CVE-2022-0934 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.43% probability of exploitation in the next 30 days.

How do I fix CVE-2022-0934?

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-2022-0934?

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

Scan your code now

Source: NVD / NIST