Fix CVE(s): CVE-2025-8732, CVE-2026-0989, CVE-2026-0990, CVE-2026-0992

{
  "id": "15381990f436e4c9059fa85f3c4c2158588507b06351291b12c1f651ab2f7e33",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1787063229",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix CVE(s): CVE-2025-8732, CVE-2026-0989, CVE-2026-0990, CVE-2026-0992",
    "summary": "* SECURITY UPDATE: uncontrolled recursion in SGML catalog parsing - debian/patches/CVE-2025-8732.patch: thread a depth counter through xmlParseSGMLCatalog() and xmlExpandCatalog() in catalog.c and bail out past MAX_CATAL_DEPTH, and register expanded catalog filenames in the SGML hash table before recursing so a repeated CATALOG directive is only followed once, to prevent stack exhaustion and exponential re-parsing on self-referencing SGML CATALOG entries. Add test files result/catalogs/recursive, test/catalogs/recursive.script and test/catalogs/recursive.sgml - CVE-2025-8732 * SECURITY UPDATE: uncontrolled recursion in the RelaxNG parser via nested schema includes - debian/patches/CVE-2026-0989.patch: add an include depth limit to the RelaxNG parser context in relaxng.c, defaulting to 1000 and overridable via the RNG_INCLUDE_LIMIT environment variable or the new xmlRelaxParserSetIncLImit() entry point in include/libxml/relaxng.h, and make xmlRelaxNGIncludePush() failures propagate. Add coverage in runtest.c and test/relaxng/include/include-limit*.rng - debian/libxml2.symbols: add the new xmlRelaxParserSetIncLImit symbol - CVE-2026-0989 * SECURITY UPDATE: uncontrolled recursion in XML catalog URI resolution - debian/patches/CVE-2026-0990.patch: add a MAX_CATAL_DEPTH guard to xmlCatalogListXMLResolveURI() in catalog.c and stop clobbering the catalog entry used for depth bookkeeping while walking the entry list, to prevent stack exhaustion on a self-referencing delegateURI entry",
    "evidence": "osv:CLSA-2026-1787063229",
    "products": [
      {
        "name": {
          "value": "libxml2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-dev",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-doc",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-utils",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python-libxml2",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python3-libxml2",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7",
            "evidence": "/affected/5/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1787063229",
      "aliases": [
        "CLSA-2026-1787063229"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2",
            "purl": "pkg:deb/tuxcare/libxml2?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-dev",
            "purl": "pkg:deb/tuxcare/libxml2-dev?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-doc",
            "purl": "pkg:deb/tuxcare/libxml2-doc?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-utils",
            "purl": "pkg:deb/tuxcare/libxml2-utils?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python-libxml2",
            "purl": "pkg:deb/tuxcare/python-libxml2?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.10+dfsg-5ubuntu0.20.04.10+tuxcare.els7"
                }
              ]
            }
          ],
          "package": {
            "name": "python3-libxml2",
            "purl": "pkg:deb/tuxcare/python3-libxml2?distro=debian-10",
            "ecosystem": "TuxCare:Debian:10"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/debian10els/CLSA-2026-1787063229.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:52.918506425Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-8732",
        "CVE-2026-0989",
        "CVE-2026-0990",
        "CVE-2026-0992"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/debian10els/CLSA-2026-1787063229.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-8732",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-0989",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-0990",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-0992"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-8732",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-0989",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-0990",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-0992",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 448809,
  "published_at": "2026-08-18T14:27:22+00:00"
}