QSN-8696-1: Bind vulnerability
2026-08-31

Summary:
Bind could be made to crash if it received specially crafted network
traffic.

Details:
It was discovered that Bind incorrectly handled DNSSEC validation when a
domain was covered by both NSEC and NSEC3 records with only one type having
an RRSIG. A remote attacker could possibly use this issue to cause Bind to
crash, resulting in a denial of service.

Affected QuantaStor releases:
  6.9.1.001 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.9.1.001 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.9.1.001 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.9.0.464 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.9.0.464 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.9.0.464 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.7 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.6.015 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.6 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.6.015 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.6 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.6.015 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.6 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.5.018 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.5.018 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.5.018 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.4.038 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.4.038 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.4.038 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.3.018 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.3.018 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.3.018 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.2.002 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.2.002 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.2.002 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.1.007 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.1.007 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.1.007 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.0.205 jammy: bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.0.205 jammy: bind9-host 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)
  6.8.0.205 jammy: bind9-libs 1:9.18.39-0ubuntu0.22.04.4 (fixed in 1:9.18.39-0ubuntu0.22.04.6)

CVEs: CVE-2026-13204

References:
  https://ubuntu.com/security/notices/USN-8696-1