GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
usn-8293-1
Vulnerability from osv_ubuntu
Published
2026-05-21 19:11
Modified
2026-06-30 15:55
Summary
bind9 vulnerabilities
Details

Vitaly Simonovich discovered that Bind could exhaust memory during GSS-API TKEY negotiation. A remote attacker could possibly use this issue to cause Bind to use excessive resources, leading to a denial of service. (CVE-2026-3039)

Shuhan Zhang discovered that Bind incorrectly handled self-pointed glue records. A remote attacker could possibly use this issue to use Bind in denial of service amplification attacks against other systems. (CVE-2026-3592)

Naresh Kandula Parmar discovered that Bind incorrectly handled memory in the DNS-over-HTTPS implementation. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-3593)

It was discovered that Bind incorrectly handled DNS messages whose class was not IN. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. (CVE-2026-5946)

Naoki Wakamatsu discovered that Bind incorrectly handled SIG(0) validation during a query flood. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-5947)

Billy Baraja discovered that Bind had an unbounded resend loop in the resolver. A remote attacker could possibly use this issue to cause Bind to use excessive resources, leading to a denial of service. (CVE-2026-5950)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-3039",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3592",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5946",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5950",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.22.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.22.04.4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.22.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.16.15-1ubuntu1",
        "1:9.16.15-1ubuntu2",
        "1:9.16.15-1ubuntu3",
        "1:9.18.0-2ubuntu1",
        "1:9.18.0-2ubuntu2",
        "1:9.18.0-2ubuntu3",
        "1:9.18.1-1ubuntu1",
        "1:9.18.1-1ubuntu1.1",
        "1:9.18.1-1ubuntu1.2",
        "1:9.18.1-1ubuntu1.3",
        "1:9.18.12-0ubuntu0.22.04.1",
        "1:9.18.12-0ubuntu0.22.04.2",
        "1:9.18.12-0ubuntu0.22.04.3",
        "1:9.18.18-0ubuntu0.22.04.1",
        "1:9.18.18-0ubuntu0.22.04.2",
        "1:9.18.24-0ubuntu0.22.04.1",
        "1:9.18.28-0ubuntu0.22.04.1",
        "1:9.18.30-0ubuntu0.22.04.1",
        "1:9.18.30-0ubuntu0.22.04.2",
        "1:9.18.39-0ubuntu0.22.04.1",
        "1:9.18.39-0ubuntu0.22.04.2",
        "1:9.18.39-0ubuntu0.22.04.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-3039",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3592",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5946",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5950",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.39-0ubuntu0.24.04.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.39-0ubuntu0.24.04.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.39-0ubuntu0.24.04.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.18.18-0ubuntu2",
        "1:9.18.21-0ubuntu1",
        "1:9.18.24-0ubuntu3",
        "1:9.18.24-0ubuntu4",
        "1:9.18.24-0ubuntu5",
        "1:9.18.28-0ubuntu0.24.04.1",
        "1:9.18.30-0ubuntu0.24.04.1",
        "1:9.18.30-0ubuntu0.24.04.2",
        "1:9.18.39-0ubuntu0.24.04.1",
        "1:9.18.39-0ubuntu0.24.04.2",
        "1:9.18.39-0ubuntu0.24.04.3"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-3039",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3592",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3593",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5946",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5947",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5950",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.20.11-1ubuntu2.4"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.11-1ubuntu2.4"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.11-1ubuntu2.4"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.11-1ubuntu2.4"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.11-1ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.11-1ubuntu2.4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.11-1ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.4-3ubuntu1",
        "1:9.20.4-3ubuntu2",
        "1:9.20.4-3ubuntu3",
        "1:9.20.9-2ubuntu1",
        "1:9.20.10-1ubuntu1",
        "1:9.20.11-1ubuntu1",
        "1:9.20.11-1ubuntu2",
        "1:9.20.11-1ubuntu2.1",
        "1:9.20.11-1ubuntu2.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-3039",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3592",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-3593",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5946",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5947",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-5950",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.20.18-1ubuntu2.1"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.18-1ubuntu2.1"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.18-1ubuntu2.1"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.18-1ubuntu2.1"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.18-1ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.18-1ubuntu2.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.18-1ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.11-1ubuntu2",
        "1:9.20.11-1ubuntu3",
        "1:9.20.18-1ubuntu1",
        "1:9.20.18-1ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Vitaly Simonovich discovered that Bind could exhaust memory during GSS-API\nTKEY negotiation. A remote attacker could possibly use this issue to cause\nBind to use excessive resources, leading to a denial of service.\n(CVE-2026-3039)\n\nShuhan Zhang discovered that Bind incorrectly handled self-pointed glue\nrecords. A remote attacker could possibly use this issue to use Bind in\ndenial of service amplification attacks against other systems.\n(CVE-2026-3592)\n\nNaresh Kandula Parmar discovered that Bind incorrectly handled memory in\nthe DNS-over-HTTPS implementation. A remote attacker could possibly use\nthis issue to cause Bind to crash, resulting in a denial of service, or\nexecute arbitrary code. This issue only affected Ubuntu 25.10 and Ubuntu\n26.04 LTS. (CVE-2026-3593)\n\nIt was discovered that Bind incorrectly handled DNS messages whose class\nwas not IN. A remote attacker could possibly use this issue to cause Bind\nto crash, resulting in a denial of service. (CVE-2026-5946)\n\nNaoki Wakamatsu discovered that Bind incorrectly handled SIG(0) validation\nduring a query flood. A remote attacker could possibly use this issue to\ncause Bind to crash, resulting in a denial of service. This issue only\naffected Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-5947)\n\nBilly Baraja discovered that Bind had an unbounded resend loop in the\nresolver. A remote attacker could possibly use this issue to cause Bind to\nuse excessive resources, leading to a denial of service. (CVE-2026-5950)",
  "id": "USN-8293-1",
  "modified": "2026-06-30T15:55:19Z",
  "published": "2026-05-21T19:11:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8293-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3039"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3592"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3593"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5946"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5947"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5950"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-3039",
    "UBUNTU-CVE-2026-3592",
    "UBUNTU-CVE-2026-3593",
    "UBUNTU-CVE-2026-5946",
    "UBUNTU-CVE-2026-5947",
    "UBUNTU-CVE-2026-5950"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.