Insufficient verification of data authenticity in FreeBSD - CVE-2026-10846

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Main Vulnerability Database Vulnerabilities #VU134361

Insufficient verification of data authenticity in FreeBSD - CVE-2026-10846

Published: June 11, 2026


Vulnerability identifier: #VU134361
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-10846
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to spoof DNS responses and inject arbitrary DNS data.

The vulnerability exists due to improper response validation in the ldns stub resolver when processing UDP DNS responses. A remote attacker can send a spoofed UDP response to spoof DNS responses and inject arbitrary DNS data.

The issue affects ldns when used as a stub resolver over UDP and can be exploited by an off-path adversary that cannot observe the original query.


Affected software

FreeBSD
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
SUSE Package Hub 15
Basesystem Module
Development Tools Module
openSUSE Leap
Ubuntu
openEuler
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
ldns (Ubuntu package)
ldns
ldns-devel
ldns-doc
ldns-debugsource
ldns-debuginfo
perl-ldns
python2-ldns
python3-ldns
ldns-help
libldns2-debuginfo
perl-DNS-LDNS-debuginfo
libldns2
perl-DNS-LDNS
ldns (Red Hat package)
libldns3-debuginfo
python3-ldns-debuginfo
libldns3
lego

How to mitigate CVE-2026-10846

Install security update from vendor's website.

ldns (Ubuntu package) - addressed in versions 1.6.17-8ubuntu0.1+esm2, 1.7.0-3ubuntu4.1+esm1, 1.7.0-4.1ubuntu1+esm2, 1.7.1-2ubuntu4+esm2, 1.8.3-2ubuntu0.1~esm1, 1.8.4-2ubuntu0.26.04.1~esm1
ldns - update to 1.7.0-23
ldns-devel - update to 1.7.0-23
ldns-doc - update to 1.7.0-23
ldns-devel - update to 1.7.0-27
ldns-debugsource - update to 1.7.0-27
ldns-debuginfo - update to 1.7.0-27
ldns - update to 1.7.0-27
perl-ldns - update to 1.7.0-27
python2-ldns - update to 1.7.0-27
python3-ldns - update to 1.7.0-27
ldns-help - update to 1.7.0-27
libldns2-debuginfo - update to 1.7.0-150000.4.11.1
perl-DNS-LDNS-debuginfo - addressed in versions 1.7.0-150000.4.11.1, 1.8.3-150600.3.3.1
ldns-devel - addressed in versions 1.7.0-150000.4.11.1, 1.8.3-150600.3.3.1
ldns-debugsource - addressed in versions 1.7.0-150000.4.11.1, 1.8.3-150600.3.3.1
libldns2 - update to 1.7.0-150000.4.11.1
ldns-debuginfo - addressed in versions 1.7.0-150000.4.11.1, 1.8.3-150600.3.3.1
perl-DNS-LDNS - addressed in versions 1.7.0-150000.4.11.1, 1.8.3-150600.3.3.1
ldns (Red Hat package) - addressed in versions 1.7.1-11.el9_2.1, 1.7.1-11.el9_4.1, 1.7.1-12.el9_8.1, 1.8.3-18.el10_0.1, 1.8.3-18.el10_2.1
libldns3-debuginfo - update to 1.8.3-150600.3.3.1
python3-ldns-debuginfo - update to 1.8.3-150600.3.3.1
ldns - update to 1.8.3-150600.3.3.1
python3-ldns - update to 1.8.3-150600.3.3.1
libldns3 - update to 1.8.3-150600.3.3.1
ldns - addressed in versions 1.9.2-1.fc43, 1.9.2-1.fc44
lego - addressed in versions 5.3.1-2.fc43, 5.3.1-2.fc44

External References

Related Security Bulletins