CVE-2026-13002
Publication date 17 August 2026
Last updated 18 August 2026
Ubuntu priority
Description
A flow has been identified into dnssec.c library, causing an infinite loop to dnsmasq service. An attacker who controls any DNSSEC-signed zone can hang the dnsmasq process with a single crafted response, killing all DNS resolution for its clients.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| dnsmasq | 26.04 LTS resolute |
Vulnerable, fix deferred
|
| 24.04 LTS noble |
Vulnerable, fix deferred
|
|
| 22.04 LTS jammy |
Vulnerable, fix deferred
|
|
| 20.04 LTS focal |
Vulnerable, fix deferred
|
|
| 18.04 LTS bionic |
Vulnerable, fix deferred
|
|
| 16.04 LTS xenial |
Vulnerable, fix deferred
|
|
| 14.04 LTS trusty |
Vulnerable, fix deferred
|
Notes
mdeslaur
as of 2026-08-17, the only information about this issue is the Red Hat bug, there are no details on a fix
Severity score breakdown
CVSS version: CVSS v3.0
Base score
4.4 · Medium
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H