unbound: Fix of 5 CVEs

{
  "id": "cc79173f9fd723de0d7afd40ba465ea70042c72ff6c53922d64db89944d06786",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1780477611",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "unbound: Fix of 5 CVEs",
    "summary": "- CVE-2026-42960: prevent cache poisoning via promiscuous additional-section records by marking glue only for NS RRsets in the authority section [ELSCVE-130594] - CVE-2026-42944: fix heap overflow and crash with multiple NSID and PADDING EDNS options by deduplicating options and adding bounds checks in attach_edns_record_max_msg_sz [ELSCVE-130649] - CVE-2026-41292: cap parsed EDNS options at MAX_PARSED_EDNS_OPTIONS (100) to prevent DoS via long option lists [ELSCVE-130636] - CVE-2026-42959: fix out-of-bounds write in val_fill_reply by indexing the destination array with chase->ns_numrrsets instead of orig->ns_numrrsets [ELSCVE-130615] - CVE-2026-40622: prevent ghost-domain TTL extension by clamping newd->ttl to cached->ttl in the higher-trust branch of need_to_update_rrset [ELSCVE-129354]",
    "evidence": "osv:CLSA-2026-1780477611",
    "products": [
      {
        "name": {
          "value": "python3-unbound",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.16.2-3.el9_2.tuxcare.els6",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "unbound",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.16.2-3.el9_2.tuxcare.els6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "unbound-devel",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.16.2-3.el9_2.tuxcare.els6",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "unbound-libs",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.16.2-3.el9_2.tuxcare.els6",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1780477611",
      "aliases": [
        "CLSA-2026-1780477611"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.16.2-3.el9_2.tuxcare.els6"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-unbound",
            "purl": "pkg:rpm/tuxcare/python3-unbound?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1780477611.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.16.2-3.el9_2.tuxcare.els6"
                }
              ]
            }
          ],
          "package": {
            "name": "unbound",
            "purl": "pkg:rpm/tuxcare/unbound?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1780477611.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.16.2-3.el9_2.tuxcare.els6"
                }
              ]
            }
          ],
          "package": {
            "name": "unbound-devel",
            "purl": "pkg:rpm/tuxcare/unbound-devel?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1780477611.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.16.2-3.el9_2.tuxcare.els6"
                }
              ]
            }
          ],
          "package": {
            "name": "unbound-libs",
            "purl": "pkg:rpm/tuxcare/unbound-libs?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1780477611.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:51.124851166Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-40622",
        "CVE-2026-41292",
        "CVE-2026-42944",
        "CVE-2026-42959",
        "CVE-2026-42960"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1780477611.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40622",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-41292",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42944",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42959",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42960"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-40622",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-41292",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42944",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42959",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42960",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 450190,
  "published_at": "2026-06-03T09:07:07+00:00"
}