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RHEL 8 : ldns (RHSA-2026:49520)

high Nessus Plugin ID 331700

Synopsis

The remote Red Hat host is missing a security update for ldns.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:49520 advisory.

 The ldns packages contain a library with the aim to simplify DNS programming in C. All low-level DNS/DNSSEC operations are supported. We also define a higher level API which allows a programmer to (for instance) create or sign packets.

 Security Fix(es):

 * ldns: ldns: Off-path poisoning attacks due to insufficient query-response matching (CVE-2026-10846)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL ldns package based on the guidance in RHSA-2026:49520.

See Also

https://access.redhat.com/errata/RHSA-2026:49520

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2487437

http://www.nessus.org/u?7052d0c2

Plugin Details

Severity: High

ID: 331700

File Name: redhat-RHSA-2026-49520.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/3/2026

Updated: 8/3/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-10846

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:ldns-devel, p-cpe:/a:redhat:enterprise_linux:ldns-doc, p-cpe:/a:redhat:enterprise_linux:ldns-utils, p-cpe:/a:redhat:enterprise_linux:ldns, p-cpe:/a:redhat:enterprise_linux:perl-ldns, p-cpe:/a:redhat:enterprise_linux:python3-ldns

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 8/3/2026

Vulnerability Publication Date: 6/10/2026

Reference Information

CVE: CVE-2026-10846

CWE: 940

RHSA: 2026:49520