Packages
- bind9 - Internet Domain Name Server
Details
It was discovered that Bind incorrectly accepted NSEC3 records whose signer
name did not match the owning zone. A remote attacker could possibly use
this issue to perform NSEC3 impersonation attacks, bypassing DNSSEC
validation. (CVE-2026-10723)
It was discovered that Bind incorrectly handled Key Records using the
PRIVATEDNS algorithm. A remote attacker could possibly use this issue to
cause Bind to crash, resulting in a denial of service. (CVE-2026-10822)
It was discovered that Bind incorrectly handled wildcard CNAME expansion in
Response Policy Zones. A remote attacker could possibly use this issue to
bypass configured RPZ policies. (CVE-2026-11331)
It was discovered that Bind performed unnecessary validation of DNSSEC
signed records. A remote attacker could possibly use this issue to cause
Bind to use...
It was discovered that Bind incorrectly accepted NSEC3 records whose signer
name did not match the owning zone. A remote attacker could possibly use
this issue to perform NSEC3 impersonation attacks, bypassing DNSSEC
validation. (CVE-2026-10723)
It was discovered that Bind incorrectly handled Key Records using the
PRIVATEDNS algorithm. A remote attacker could possibly use this issue to
cause Bind to crash, resulting in a denial of service. (CVE-2026-10822)
It was discovered that Bind incorrectly handled wildcard CNAME expansion in
Response Policy Zones. A remote attacker could possibly use this issue to
bypass configured RPZ policies. (CVE-2026-11331)
It was discovered that Bind performed unnecessary validation of DNSSEC
signed records. A remote attacker could possibly use this issue to cause
Bind to use excessive resources, leading to a denial of service. This issue
only affected Ubuntu 26.04 LTS. (CVE-2026-11605)
It was discovered that Bind incorrectly tracked memory usage in the DNS
cache. A remote attacker could possibly use this issue to cause Bind to use
memory beyond configured limits, leading to a denial of service.
(CVE-2026-11622)
It was discovered that Bind incorrectly handled signed wildcard records
with label count discrepancies and RRSIG validation. A remote attacker
could possibly use this issue to perform cache poisoning attacks.
(CVE-2026-11721)
It was discovered that Bind incorrectly handled certain CNAME and DNAME
record orderings in the resolver. A remote attacker could possibly use this
issue to cause Bind to crash, resulting in a denial of service.
(CVE-2026-12617)
It was discovered that Bind incorrectly validated out-of-zone NSEC next
owner names during DNSSEC validation. A remote attacker could possibly use
this issue to bypass DNSSEC validation. (CVE-2026-13321)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | bind9 – 1:9.20.24-1ubuntu0.2 | ||
| 24.04 LTS noble | bind9 – 1:9.18.39-0ubuntu0.24.04.6 | ||
| 22.04 LTS jammy | bind9 – 1:9.18.39-0ubuntu0.22.04.5 | ||
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