UnratedFix available

DEBIAN-CVE-2026-11622

Type: advisorySource: OSV1 source record

A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. 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-2026-11622

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-2026-11622

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-2026-11622.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
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          }
        ]
      }
    ],
    "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-2026-11622.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-2026-11622.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #55470 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 15:57:29 GMT
Publisher date: Wed, 22 Jul 2026 15:16:51 GMT

Read the original announcement