UnratedFix available

DEBIAN-CVE-2026-13321

Type: advisorySource: OSV1 source record

The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.

Announced 22 Jul 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-13321

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-13321

bind9

Source reference: /affected/0/package/name

Affected versions: 1:9.18.12-1
Source reference: /affected/0/versions
1:9.18.13-1
Source reference: /affected/0/versions
1:9.18.16-1
Source reference: /affected/0/versions
1:9.18.16-1~deb12u1
Source reference: /affected/0/versions
1:9.18.16-1~deb12u1~bpo11+1
Source reference: /affected/0/versions
1:9.18.19-1~deb12u1
Source reference: /affected/0/versions
1:9.18.19-1~deb12u1~bpo11+1
Source reference: /affected/0/versions
1:9.18.24-1
Source reference: /affected/0/versions
1:9.18.24-1~bpo11+1
Source reference: /affected/0/versions
1:9.18.28-1~deb12u1
Source reference: /affected/0/versions
1:9.18.28-1~deb12u2
Source reference: /affected/0/versions
1:9.18.33-1~deb12u2
Source reference: /affected/0/versions
1:9.18.41-1~deb12u1
Source reference: /affected/0/versions
1:9.18.44-1~deb12u1
Source reference: /affected/0/versions
1:9.18.47-1~deb12u1
Source reference: /affected/0/versions
1:9.18.49-1~deb12u1
Source reference: /affected/0/versions
Fixed versions: 1:9.18.49-1~deb12u2
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

bind9

Source reference: /affected/1/package/name

Affected versions: 1:9.20.11-4
Source reference: /affected/1/versions
1:9.20.15-1
Source reference: /affected/1/versions
1:9.20.15-1~deb13u1
Source reference: /affected/1/versions
1:9.20.15-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
1:9.20.15-2
Source reference: /affected/1/versions
1:9.20.18-1
Source reference: /affected/1/versions
1:9.20.18-1~deb13u1
Source reference: /affected/1/versions
1:9.20.18-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
1:9.20.19-1
Source reference: /affected/1/versions
1:9.20.19-1~bpo12+1
Source reference: /affected/1/versions
1:9.20.20-1
Source reference: /affected/1/versions
1:9.20.20-1~bpo12+1
Source reference: /affected/1/versions
1:9.20.21-1
Source reference: /affected/1/versions
1:9.20.21-1~deb13u1
Source reference: /affected/1/versions
1:9.20.21-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
1:9.20.22-1
Source reference: /affected/1/versions
1:9.20.23-1
Source reference: /affected/1/versions
1:9.20.23-1~deb13u1
Source reference: /affected/1/versions
1:9.20.23-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
1:9.20.24-1
Source reference: /affected/1/versions
1:9.20.26-1~deb13u1~bpo12+1
Source reference: /affected/1/versions
Fixed versions: 1:9.20.26-1~deb13u1
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

bind9

Source reference: /affected/2/package/name

Affected versions: 1:9.20.11-4
Source reference: /affected/2/versions
1:9.20.15-1
Source reference: /affected/2/versions
1:9.20.15-1~deb13u1
Source reference: /affected/2/versions
1:9.20.15-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
1:9.20.15-2
Source reference: /affected/2/versions
1:9.20.18-1
Source reference: /affected/2/versions
1:9.20.18-1~deb13u1
Source reference: /affected/2/versions
1:9.20.18-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
1:9.20.19-1
Source reference: /affected/2/versions
1:9.20.19-1~bpo12+1
Source reference: /affected/2/versions
1:9.20.20-1
Source reference: /affected/2/versions
1:9.20.20-1~bpo12+1
Source reference: /affected/2/versions
1:9.20.21-1
Source reference: /affected/2/versions
1:9.20.21-1~deb13u1
Source reference: /affected/2/versions
1:9.20.21-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
1:9.20.22-1
Source reference: /affected/2/versions
1:9.20.23-1
Source reference: /affected/2/versions
1:9.20.23-1~deb13u1
Source reference: /affected/2/versions
1:9.20.23-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
1:9.20.24-1
Source reference: /affected/2/versions
1:9.20.26-1~deb13u1
Source reference: /affected/2/versions
1:9.20.26-1~deb13u1~bpo12+1
Source reference: /affected/2/versions
Fixed versions: 1:9.20.26-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:9.18.49-1~deb12u2"
          }
        ]
      }
    ],
    "package": {
      "name": "bind9",
      "purl": "pkg:deb/debian/bind9?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1:9.18.12-1",
      "1:9.18.13-1",
      "1:9.18.16-1",
      "1:9.18.16-1~deb12u1",
      "1:9.18.16-1~deb12u1~bpo11+1",
      "1:9.18.19-1~deb12u1",
      "1:9.18.19-1~deb12u1~bpo11+1",
      "1:9.18.24-1",
      "1:9.18.24-1~bpo11+1",
      "1:9.18.28-1~deb12u1",
      "1:9.18.28-1~deb12u2",
      "1:9.18.33-1~deb12u2",
      "1:9.18.41-1~deb12u1",
      "1:9.18.44-1~deb12u1",
      "1:9.18.47-1~deb12u1",
      "1:9.18.49-1~deb12u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-13321.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:9.20.26-1~deb13u1"
          }
        ]
      }
    ],
    "package": {
      "name": "bind9",
      "purl": "pkg:deb/debian/bind9?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1:9.20.11-4",
      "1:9.20.15-1",
      "1:9.20.15-1~deb13u1",
      "1:9.20.15-1~deb13u1~bpo12+1",
      "1:9.20.15-2",
      "1:9.20.18-1",
      "1:9.20.18-1~deb13u1",
      "1:9.20.18-1~deb13u1~bpo12+1",
      "1:9.20.19-1",
      "1:9.20.19-1~bpo12+1",
      "1:9.20.20-1",
      "1:9.20.20-1~bpo12+1",
      "1:9.20.21-1",
      "1:9.20.21-1~deb13u1",
      "1:9.20.21-1~deb13u1~bpo12+1",
      "1:9.20.22-1",
      "1:9.20.23-1",
      "1:9.20.23-1~deb13u1",
      "1:9.20.23-1~deb13u1~bpo12+1",
      "1:9.20.24-1",
      "1:9.20.26-1~deb13u1~bpo12+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-13321.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:9.20.26-1"
          }
        ]
      }
    ],
    "package": {
      "name": "bind9",
      "purl": "pkg:deb/debian/bind9?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1:9.20.11-4",
      "1:9.20.15-1",
      "1:9.20.15-1~deb13u1",
      "1:9.20.15-1~deb13u1~bpo12+1",
      "1:9.20.15-2",
      "1:9.20.18-1",
      "1:9.20.18-1~deb13u1",
      "1:9.20.18-1~deb13u1~bpo12+1",
      "1:9.20.19-1",
      "1:9.20.19-1~bpo12+1",
      "1:9.20.20-1",
      "1:9.20.20-1~bpo12+1",
      "1:9.20.21-1",
      "1:9.20.21-1~deb13u1",
      "1:9.20.21-1~deb13u1~bpo12+1",
      "1:9.20.22-1",
      "1:9.20.23-1",
      "1:9.20.23-1~deb13u1",
      "1:9.20.23-1~deb13u1~bpo12+1",
      "1:9.20.24-1",
      "1:9.20.26-1~deb13u1",
      "1:9.20.26-1~deb13u1~bpo12+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-13321.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #55502 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 16:01:25 GMT
Publisher date: Wed, 22 Jul 2026 15:16:52 GMT

Read the original announcement