Fix of 5 CVEs

{
  "id": "fb71e9866ad0894d37c81c24dc1e58152e517c7c2c9da7cddaf530166a2d3b9c",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1789601022",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Fix of 5 CVEs",
    "summary": "* SECURITY UPDATE: stack buffer overflow in xmlSnprintfElements() - debian/patches/CVE-2026-86140.patch: add bounds checks around the parenthesis writes in xmlSnprintfElements() in valid.c - CVE-2026-86140 * SECURITY UPDATE: NULL pointer dereference in xmlRegNewParserCtxt() after a failed allocation - debian/patches/CVE-2026-86141.patch: check the xmlStrdup() result in xmlRegNewParserCtxt() in xmlregexp.c so a failed allocation cannot leave a NULL parser cursor - CVE-2026-86141 * SECURITY UPDATE: heap buffer overflow in xmlXPtrEvalXPtrPart() on oversized xpointer() expressions - debian/patches/CVE-2026-86142.patch: make xmlStrlen() in xmlstring.c saturate above INT_MAX and reject the saturated length in xmlXPtrEvalXPtrPart() in xpointer.c before sizing the buffer - CVE-2026-86142 * SECURITY UPDATE: integer overflow before the output write callback - debian/patches/CVE-2026-86143.patch: check for integer overflow before passing a buffer length to the write callback in xmlIO.c - CVE-2026-86143 * SECURITY UPDATE: parse flags not propagated by xmlXIncludeProcess() and xmlXIncludeProcessTree() - debian/patches/CVE-2026-86144.patch: propagate the document parse flags in xmlXIncludeProcess() and xmlXIncludeProcessTree() in xinclude.c - CVE-2026-86144",
    "evidence": "osv:CLSA-2026-1789601022",
    "products": [
      {
        "name": {
          "value": "libxml2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-dev",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-doc",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "libxml2-utils",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "python-libxml2",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1789601022",
      "aliases": [
        "CLSA-2026-1789601022"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2",
            "purl": "pkg:deb/tuxcare/libxml2?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789601022.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-dev",
            "purl": "pkg:deb/tuxcare/libxml2-dev?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789601022.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-doc",
            "purl": "pkg:deb/tuxcare/libxml2-doc?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789601022.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-utils",
            "purl": "pkg:deb/tuxcare/libxml2-utils?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789601022.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.3+dfsg1-1ubuntu0.7+tuxcare.els16"
                }
              ]
            }
          ],
          "package": {
            "name": "python-libxml2",
            "purl": "pkg:deb/tuxcare/python-libxml2?distro=ubuntu-16.04",
            "ecosystem": "TuxCare:Ubuntu:16.04"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789601022.json"
          }
        }
      ],
      "modified": "2026-10-26T09:32:02.512365505Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-86140",
        "CVE-2026-86141",
        "CVE-2026-86142",
        "CVE-2026-86143",
        "CVE-2026-86144"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1789601022.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86140",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86141",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86142",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86143",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-86144"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-86140",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-86141",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-86142",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-86143",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-86144",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449451,
  "published_at": "2026-09-16T23:23:57+00:00"
}