{
  "schema_version": "1.7.0",
  "id": "MGASA-2026-0459",
  "published": "2026-09-28T17:04:04Z",
  "modified": "2026-09-28T15:57:23Z",
  "summary": "Updated libxml2 packages fix security vulnerabilities",
  "details": "The updated packages fix several security issues:\nStack-Based Buffer Overflow in libxml2. (CVE-2026-11979)\nIn libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds\nread, aka an out-of-bounds read in the NXT macro in xmlregexp.\n(CVE-2026-86137)\nIn libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer\noverflow and resultant heap-based buffer overflow. (CVE-2026-86138)\nIn libxml2 before 2.15.4, xmlURIEscapeStr in uri.c has an integer\noverflow. (CVE-2026-86139)\nIn libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat\nstack-based buffer overflow. (CVE-2026-86140)\nxmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in\nxmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate\na string length after NULL checking. (CVE-2026-86141)\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in\nxmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.\n(CVE-2026-86142)\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in\nxmlOutputWriteCallback and xmlBufUse causes negative lengths to reach\nwrite callbacks, aka a lack of a check for integer overflow before\ncalling writecallback. This has security relevance for many types of\nuses of that length value within a callback. (CVE-2026-86143)\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and\nxmlXIncludeProcessTree do not propagate parseFlags. This has security\nrelevance for, for example, the XML_PARSE_NONET flag, if (without it) a\ncustom resource loader accesses the internet and triggers XML external\nentity injection, SSRF, or a denial of service (e.g., for an\nattacker-controlled internet resource that is intentionally slow).\n(CVE-2026-86144)\n",
  "upstream": [
    "CVE-2026-11979",
    "CVE-2026-86137",
    "CVE-2026-86138",
    "CVE-2026-86139",
    "CVE-2026-86140",
    "CVE-2026-86141",
    "CVE-2026-86142",
    "CVE-2026-86143",
    "CVE-2026-86144"
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://advisories.mageia.org/MGASA-2026-0459.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.mageia.org/show_bug.cgi?id=35932"
    },
    {
      "type": "WEB",
      "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/message/ZWJ6JIPH33FSDSBTGTTXHQQKFJEXIKRU/"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1124"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/09/04/5"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/09/05/4"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Mageia:10",
        "name": "libxml2",
        "purl": "pkg:rpm/mageia/libxml2?arch=source&distro=mageia-10"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.15.1-3.2.mga10"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "core"
      }
    }
  ],
  "credits": [
    {
      "name": "Mageia",
      "type": "COORDINATOR",
      "contact": [
        "https://wiki.mageia.org/en/Packages_Security_Team"
      ]
    }
  ]
}