Insufficient verification of data authenticity in FreeBSD - CVE-2026-10846
Published: June 11, 2026
Vulnerability identifier: #VU134361
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-10846
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
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.
How to mitigate CVE-2026-10846
Install security update from vendor's website.