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Echo: dnsmasq: security update to 2.91-1+deb13u2

medium Tenable Self-Hosted Container Security Plugin ID 463269

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and query logging are both
 enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause
 dnsmasq to write past the end of an internal logging buffer. A remote attacker able to supply such a DNS
 response may crash the dnsmasq process, resulting in denial of service. (CVE-2026-12725)

Solution

Update the dnsmasq library and its related packages to version 2.91-1+deb13u2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-12725

Plugin Details

Severity: Medium

ID: 463269

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-12725

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/6/2026

Vulnerability Publication Date: 6/22/2026

Reference Information

CVE: CVE-2026-12725

IAVA: 2026-A-0668