RHSA-2026:71487 — Security Advisory
Red Hat Security Advisory: unbound security update
Severity
CriticalRed Hat Product Security
Products
Official CSAF product identity
Published · September 25, 2026
Updated · November 3, 2026
Topic
An update for unbound is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
Security Fix(es):
-
unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis (CVE-2026-82717)
-
unbound: Unbound: Heap buffer overflow via malicious DNSSEC response (CVE-2026-81634)
-
unbound: Unbound: Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY (CVE-2026-81642)
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.