Fix CVE(s): CVE-2026-41080

{
  "id": "9f6a0820972adfd057c85d287f904e5a61da8ea06bcdad2ae8ee8140d41936ce",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1780663178",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2026-41080",
    "summary": "* SECURITY UPDATE: hash flooding via crafted XML caused by insufficient entropy in the hash secret salt - debian/patches/CVE-2026-41080.patch: migrate hash salt storage to a full 128-bit struct sipkey and extract 16 bytes of entropy (instead of 4 to 8) in expat/lib/xmlparse.c; add XML_SetHashSalt16Bytes() API in expat/lib/expat.h for supplying a full 128-bit salt - debian/libexpat1.symbols: add new XML_SetHashSalt16Bytes symbol - CVE-2026-41080",
    "evidence": "osv:CLSA-2026-1780663178",
    "products": [
      {
        "name": {
          "value": "expat",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.2.9-1ubuntu0.8+tuxcare.els5",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libexpat1",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.2.9-1ubuntu0.8+tuxcare.els5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libexpat1-dev",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.2.9-1ubuntu0.8+tuxcare.els5",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1780663178",
      "aliases": [
        "CLSA-2026-1780663178"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.2.9-1ubuntu0.8+tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "expat",
            "purl": "pkg:deb/tuxcare/expat?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1780663178.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.2.9-1ubuntu0.8+tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "libexpat1",
            "purl": "pkg:deb/tuxcare/libexpat1?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1780663178.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.2.9-1ubuntu0.8+tuxcare.els5"
                }
              ]
            }
          ],
          "package": {
            "name": "libexpat1-dev",
            "purl": "pkg:deb/tuxcare/libexpat1-dev?distro=ubuntu-20.04",
            "ecosystem": "TuxCare:Ubuntu:20.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1780663178.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:04.935024516Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-41080"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1780663178.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-41080"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-41080",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449646,
  "published_at": "2026-06-05T12:40:00+00:00"
}