ZDF
Sign inSign up

Vulnerabilities

Vulnerability · USN-8929-1

bind9 vulnerabilities

Published Oct 14, 2026 · catalog updated Oct 17, 2026 · bind9 vulnerabilities

Open the advisory

Exploitation likelihood is not on this record for USN-8929-1. A missing EPSS score is not a low risk. Compare bind9 vulnerabilities with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (bind9 vulnerabilities).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
Ubuntu:22.04:LTS bind9 · Ubuntu:24.04:LTS bind9 · Ubuntu:26.04:LTS bind9 · Ubuntu:Pro:14.04:LTS bind9 · Ubuntu:Pro:16.04:LTS bind9 · Ubuntu:Pro:18.04:LTS bind9

Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS. (CVE-2025-8677) Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind incorrectly accepted certain records from answers. A remote attacker could possibly use this issue to perform a cache poisoning attack. This issue only affected Ubuntu 18.04 LTS. (CVE-2025-40778) Samy Medjahed discovered that Bind incorrectly handled insecure delegation validation. A remote attacker could possibly use this issue to cause excessive NSEC3 iterations, consuming CPU resources, and leading to a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-1519) 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. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (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. This issue only affected Ubuntu 20.04 LTS. (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. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-11331) 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. This is

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Ubuntu:22.04:LTS bind90 → 1:9.18.39-0ubuntu0.22.04.7
  • Ubuntu:24.04:LTS bind90 → 1:9.18.39-0ubuntu0.24.04.8
  • Ubuntu:26.04:LTS bind90 → 1:9.20.24-1ubuntu0.4
  • Ubuntu:Pro:14.04:LTS bind90 → 1:9.9.5.dfsg-3ubuntu0.19+esm15
  • Ubuntu:Pro:16.04:LTS bind90 → 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11
  • Ubuntu:Pro:18.04:LTS bind90 → 1:9.11.3+dfsg-1ubuntu1.19+esm6
  • Ubuntu:Pro:20.04:LTS bind90 → 1:9.18.30-0ubuntu0.20.04.2+esm3

How to fix USN-8929-1

  • Recommended remediation

    A patch or advisory reference is linked. Open the original publisher for availability by product version.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for USN-8929-1. A missing EPSS score is not a low risk. Compare bind9 vulnerabilities with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0 → 1:9.18.39-0ubuntu0.22.04.7, 0 → 1:9.18.39-0ubuntu0.24.04.8, 0 → 1:9.20.24-1ubuntu0.4, 0 → 1:9.9.5.dfsg-3ubuntu0.19+esm15, 0 → 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11, 0 → 1:9.11.3+dfsg-1ubuntu1.19+esm6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS. (CVE-2025-8677) Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind incorrectly a

  2. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.9.5.dfsg-3ubuntu0.19+esm15; bind9 fixed in 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11; bind9 fixed in 1:9.11.3+dfsg-1ubuntu1.19+esm6; bind9 fixed in 1:9.18.30-0ubuntu0.20.04.2+esm3

  3. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.9.5.dfsg-3ubuntu0.19+esm15

  4. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11

  5. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.11.3+dfsg-1ubuntu1.19+esm6

  6. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.18.30-0ubuntu0.20.04.2+esm3

  7. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.18.39-0ubuntu0.22.04.7

  8. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.18.39-0ubuntu0.24.04.8

  9. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    bind9 fixed in 1:9.20.24-1ubuntu0.4

  10. Oct 17, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS. (CVE-2025-8677) Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind incorrectly a

Sources

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.