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

medium Tenable Cloud Security Plugin ID 457549

Description

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

 - An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing
 NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 additional
 bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can exploit this
 via a crafted NXDOMAIN response to cause a 10-byte heap out-of-bounds read, potentially accessing stale
 data from prior transactions. (CVE-2026-12969)

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-2026-12969

Plugin Details

Severity: Medium

ID: 457549

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2026-12969

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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: 6/23/2026

Reference Information

CVE: CVE-2026-12969

IAVA: 2026-A-0668