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libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T04:29:33.323Z","modified":"2026-09-14T13:50:49.902Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T13:49:42.666099Z"}],"euvd":[{"id":"EUVD-2026-71835","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T04:29:33Z","modified":"2026-09-14T13:50:49Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T17:28:20.757989Z"}],"ghsa":[{"id":"GHSA-499q-6rmh-w6p7","title":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of...","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T06:32:37Z","modified":"2026-09-05T06:32:44Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:11:24.326884Z"}],"nvd":[{"id":"CVE-2026-86142","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T05:17:13.133Z","modified":"2026-09-15T19:35:48.663Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:12:44.082631Z"}],"osv":[{"id":"BELL-CVE-2026-86142","status":"published","published":"2026-09-08T06:05:22.467342Z","modified":"2026-10-06T07:15:02.68230515Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:26.341144Z"},{"id":"CVE-2026-86142","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T04:29:33.323Z","modified":"2026-10-28T11:18:59.042018082Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:45:18.825071Z"},{"id":"DEBIAN-CVE-2026-86142","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T05:17:13.133Z","modified":"2026-10-01T03:03:37.312068321Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:05.022702Z"},{"id":"OESA-2026-4371","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).(CVE-2026-76781)\n\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.(CVE-2026-86142)\n\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.(CVE-2026-86143)\n\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).(CVE-2026-86144)","status":"published","published":"2026-10-16T11:59:53Z","modified":"2026-10-16T12:15:12.697555835Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4372","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).(CVE-2026-76781)\n\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.(CVE-2026-86142)\n\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.(CVE-2026-86143)\n\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).(CVE-2026-86144)","status":"published","published":"2026-10-16T11:59:53Z","modified":"2026-10-16T12:15:12.693585499Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4373","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. 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This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).(CVE-2026-76781)\n\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.(CVE-2026-86142)\n\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.(CVE-2026-86143)\n\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).(CVE-2026-86144)","status":"published","published":"2026-10-16T11:59:54Z","modified":"2026-10-16T12:15:12.714797556Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"OESA-2026-4374","title":"libxml2 security update","description":"This library allows to manipulate XML files. It includes support to read, modify and write XML and HTML files. There is DTDs support this includes parsing and validation even with complex DtDs, either at parse time or later once the document has been modified. The output can be a simple SAX stream or and in-memory DOM like representations. In this case one can use the built-in XPath and XPointer implementation to select sub nodes or ranges. A flexible Input/Output mechanism is available, with existing HTTP and FTP modules and combined to an URI library.\r\n\r\nSecurity Fix(es):\n\nA flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).(CVE-2026-76781)\n\nIn libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.(CVE-2026-86142)\n\nIn xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.(CVE-2026-86143)\n\nIn xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).(CVE-2026-86144)","status":"published","published":"2026-10-16T11:59:55Z","modified":"2026-10-16T12:15:13.597107561Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:47.981622Z"},{"id":"RHSA-2026:64463","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-09T10:19:53Z","modified":"2026-10-16T10:22:19Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:71585","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-09-25T10:15:32Z","modified":"2026-10-16T10:24:35Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.928316Z"},{"id":"RHSA-2026:71586","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-09-25T10:15:33Z","modified":"2026-10-16T10:24:36Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.928316Z"},{"id":"RHSA-2026:80675","title":"Red Hat Security Advisory: libxml2 security update","status":"published","published":"2026-10-14T10:32:09Z","modified":"2026-10-15T10:28:18Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RLSA-2026:71585","title":"Important: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)\n\n* libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n\n* libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n\n* libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n\n* libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n\n* libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-09-25T18:04:58.698983Z","modified":"2026-09-25T18:24:41.544627833Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"RLSA-2026:71586","title":"Important: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)\n\n* libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n\n* libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n\n* libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n\n* libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n\n* libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-09-25T12:09:37.504383Z","modified":"2026-09-25T12:30:02.740418238Z","cvss":[{"version":"3.1","score":8.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"RLSA-2026:80675","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.\n\nSecurity Fix(es):\n\n* libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-10-13T12:00:56.225358Z","modified":"2026-10-13T12:30:02.87743064Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"UBUNTU-CVE-2026-86142","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T05:17:00Z","modified":"2026-10-09T07:45:03.035129841Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"medium"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:57:24.828975Z"},{"id":"ALSA-2026:71585","title":"Important: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)\n  * libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n  * libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n  * libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n  * libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n  * libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-10-29T11:32:32.499614877Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"ALSA-2026:71586","title":"Important: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)\n  * libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)\n  * libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)\n  * libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n  * libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)\n  * libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-10-29T11:30:08.493986372Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"ALSA-2026:80675","title":"Moderate: libxml2 security update","description":"The libxml2 library is a development toolbox providing the implementation of various XML standards.  \n\nSecurity Fix(es):  \n\n  * libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-10-12T00:00:00Z","modified":"2026-10-29T11:02:29.661333964Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"AZL-99720","title":"CVE-2026-86142 affecting package libxml2 for versions less than 2.11.5-11","description":"In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.","status":"published","published":"2026-09-05T05:17:13Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:26.480138Z"},{"id":"CLSA-2026-1789380986","title":"libxml2: Fix of 3 CVEs","description":"- CVE-2026-86138: add overflow checks to xmlDictAddQString pool size\n  calculation and bound the QName lengths in its caller xmlDictQLookup to\n  prevent heap buffer overflow when interning long QNames\n- CVE-2026-86140: add bounds checks around the englobing parenthesis\n  strcat() calls in xmlSnprintfElements to prevent stack buffer overflow\n- CVE-2026-86142: reject XPointer parts whose length is not representable\n  as an int in xmlXPtrEvalXPtrPart to prevent heap buffer overflow","status":"published","published":"2026-09-15T14:41:33Z","modified":"2026-10-26T09:31:40.238235132Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789381419","title":"libxml2: Fix of CVE-2026-86142","description":"- CVE-2026-86142: fix heap buffer overflow in xmlXPtrEvalXPtrPart by rejecting\n  XPointer parts whose length is not representable as an int","status":"published","published":"2026-09-14T14:35:07Z","modified":"2026-10-26T09:31:48.754105359Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789381872","title":"libxml2: Fix of CVE-2026-86142","description":"- CVE-2026-86142: fix heap buffer overflow in xmlXPtrEvalXPtrPart by rejecting\n  XPointer parts whose length is not representable as an int","status":"published","published":"2026-09-14T10:31:22Z","modified":"2026-10-26T09:31:58.753086705Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789382179","title":"libxml2: Fix of CVE-2026-86142","description":"- CVE-2026-86142: fix heap buffer overflow in xmlXPtrEvalXPtrPart by rejecting\n  XPointer parts whose length is not representable as an int","status":"published","published":"2026-09-14T10:36:35Z","modified":"2026-10-26T09:31:56.008455693Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789601022","title":"Fix of 5 CVEs","description":"   * SECURITY UPDATE: stack buffer overflow in xmlSnprintfElements()\n     - debian/patches/CVE-2026-86140.patch: add bounds checks around the\n       parenthesis writes in xmlSnprintfElements() in valid.c\n     - CVE-2026-86140\n   * SECURITY UPDATE: NULL pointer dereference in xmlRegNewParserCtxt() after\n     a failed allocation\n     - debian/patches/CVE-2026-86141.patch: check the xmlStrdup() result in\n       xmlRegNewParserCtxt() in xmlregexp.c so a failed allocation cannot\n       leave a NULL parser cursor\n     - CVE-2026-86141\n   * SECURITY UPDATE: heap buffer overflow in xmlXPtrEvalXPtrPart() on\n     oversized xpointer() expressions\n     - debian/patches/CVE-2026-86142.patch: make xmlStrlen() in xmlstring.c\n       saturate above INT_MAX and reject the saturated length in\n       xmlXPtrEvalXPtrPart() in xpointer.c before sizing the buffer\n     - CVE-2026-86142\n   * SECURITY UPDATE: integer overflow before the output write callback\n     - debian/patches/CVE-2026-86143.patch: check for integer overflow before\n       passing a buffer length to the write callback in xmlIO.c\n     - CVE-2026-86143\n   * SECURITY UPDATE: parse flags not propagated by xmlXIncludeProcess() and\n     xmlXIncludeProcessTree()\n     - debian/patches/CVE-2026-86144.patch: propagate the document parse\n       flags in xmlXIncludeProcess() and xmlXIncludeProcessTree() in\n       xinclude.c\n     - CVE-2026-86144","status":"published","published":"2026-09-16T23:23:57Z","modified":"2026-10-26T09:32:02.512365505Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789601376","title":"Fix CVE(s): CVE-2026-86142, CVE-2026-86143, CVE-2026-86144","description":"   * SECURITY UPDATE: heap buffer overflow in xmlXPtrEvalXPtrPart() on\n     oversized xpointer() expressions\n     - debian/patches/CVE-2026-86142.patch: make xmlStrlen() in xmlstring.c\n       saturate above INT_MAX and reject the saturated length in\n       xmlXPtrEvalXPtrPart() in xpointer.c before sizing the buffer\n     - CVE-2026-86142\n   * SECURITY UPDATE: integer overflow before the output write callback\n     - debian/patches/CVE-2026-86143.patch: check for integer overflow before\n       passing a buffer length to the write callback in xmlIO.c\n     - CVE-2026-86143\n   * SECURITY UPDATE: parse flags not propagated by xmlXIncludeProcess() and\n     xmlXIncludeProcessTree()\n     - debian/patches/CVE-2026-86144.patch: propagate the document parse\n       flags in xmlXIncludeProcess() and xmlXIncludeProcessTree() in\n       xinclude.c\n     - CVE-2026-86144","status":"published","published":"2026-09-16T23:29:49Z","modified":"2026-10-26T09:32:04.190479059Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789632227","title":"libxml2: Fix of 5 CVEs","description":"- CVE-2026-86138: add overflow checks to xmlDictAddQString to prevent an integer overflow and heap buffer overflow\n- CVE-2026-86140: bound the writes in xmlSnprintfElements to prevent a stack buffer overflow\n- CVE-2026-86142: make xmlStrlen saturate above INT_MAX and reject the saturated\n  length in xmlXPtrEvalXPtrPart to prevent a heap buffer overflow\n- CVE-2026-86143: reject buffer lengths at or above INT_MAX before calling the output write callback to prevent an integer overflow\n- CVE-2026-86144: propagate parseFlags in xmlXIncludeProcess and xmlXIncludeProcessTree so parser flags such as XML_PARSE_NONET are honoured","status":"published","published":"2026-09-21T23:44:28Z","modified":"2026-10-26T09:31:55.004093888Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789655873","title":"libxml2: Fix of 4 CVEs","description":"- CVE-2026-86140: add the missing bounds checks around the two unguarded strcat()\n  calls in xmlSnprintfElements(), the sibling of the function fixed for\n  CVE-2025-24928\n- CVE-2026-86142: reject a saturated xmlStrlen() result in xmlXPtrEvalXPtrPart()\n  before it is used to size the XPointer buffer\n- CVE-2026-86143: check the xmlBufUse() length against INT_MAX before narrowing it\n  to the int parameter of the output writecallback, at all six call sites\n- CVE-2026-86144: propagate the document parseFlags through xmlXIncludeProcess(),\n  xmlXIncludeProcessTree() and xmlXIncludeLoadTxt() so XML_PARSE_NONET is honoured\n  during XInclude resolution","status":"published","published":"2026-09-17T14:38:07Z","modified":"2026-10-26T09:43:19.066571469Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789668093","title":"libxml2: Fix of 5 CVEs","description":"- CVE-2026-86140: add bounds checks around the parenthesis writes in xmlSnprintfElements\n- CVE-2026-86141: check the xmlStrdup result in xmlRegNewParserCtxt so a failed allocation cannot leave a NULL parser cursor\n- CVE-2026-86142: make xmlStrlen saturate above INT_MAX and reject the saturated\n  length in xmlXPtrEvalXPtrPart before sizing the buffer\n- CVE-2026-86143: check for integer overflow before passing a buffer length to the output write callback\n- CVE-2026-86144: propagate the document parse flags in xmlXIncludeProcess and xmlXIncludeProcessTree","status":"published","published":"2026-09-17T18:01:48Z","modified":"2026-10-26T09:31:51.528291438Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789668422","title":"libxml2: Fix of 5 CVEs","description":"- CVE-2026-86140: add bounds checks around the parenthesis writes in xmlSnprintfElements\n- CVE-2026-86141: check the xmlStrdup result in xmlRegNewParserCtxt so a failed allocation cannot leave a NULL parser cursor\n- CVE-2026-86142: make xmlStrlen saturate above INT_MAX and reject the saturated\n  length in xmlXPtrEvalXPtrPart before sizing the buffer\n- CVE-2026-86143: check for integer overflow before passing a buffer length to the output write callback\n- CVE-2026-86144: propagate the document parse flags in xmlXIncludeProcess and xmlXIncludeProcessTree","status":"published","published":"2026-09-17T18:07:17Z","modified":"2026-10-26T09:31:50.616503933Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789745402","title":"Fix CVE(s): CVE-2026-86142","description":"   * SECURITY UPDATE: heap-based buffer overflow in XPointer expression parsing\n     - debian/patches/CVE-2026-86142.patch: reject XPointer parts longer than\n       INT_MAX before allocating xmlXPtrEvalXPtrPart()'s copy buffer, avoiding\n       xmlStrlen() wraparound and the resulting heap overflow\n     - CVE-2026-86142","status":"published","published":"2026-09-18T15:30:13Z","modified":"2026-10-26T09:31:40.164124209Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789747948","title":"Fix CVE(s): CVE-2026-86142","description":"   * SECURITY UPDATE: heap-based buffer overflow in XPointer expression parsing\n     - debian/patches/CVE-2026-86142.patch: reject XPointer parts longer than\n       INT_MAX before allocating xmlXPtrEvalXPtrPart()'s copy buffer, avoiding\n       xmlStrlen() wraparound and the resulting heap overflow\n     - CVE-2026-86142","status":"published","published":"2026-09-18T16:12:39Z","modified":"2026-10-26T09:31:53.526838231Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789780589","title":"libxml2: Fix of 5 CVEs","description":"- CVE-2026-86140: add bounds checks around the parenthesis writes in xmlSnprintfElements\n- CVE-2026-86141: check the xmlStrdup result in xmlRegNewParserCtxt so a failed allocation cannot leave a NULL parser cursor\n- CVE-2026-86142: make xmlStrlen saturate above INT_MAX and reject the saturated\n  length in xmlXPtrEvalXPtrPart before sizing the buffer\n- CVE-2026-86143: check for integer overflow before passing a buffer length to the output write callback\n- CVE-2026-86144: propagate the document parse flags in xmlXIncludeProcess and xmlXIncludeProcessTree","status":"published","published":"2026-09-19T01:16:44Z","modified":"2026-10-26T09:30:56.266772386Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"MGASA-2026-0459","title":"Updated libxml2 packages fix security vulnerabilities","description":"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","status":"published","published":"2026-09-28T17:04:04Z","modified":"2026-09-28T17:15:03.661029458Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2026-86142","title":"CVE-2026-86142 in libxml2 - Patched by Root","description":"Root has patched CVE-2026-86142 in the libxml2 package for Root:Debian:12. Multiple fixed versions available.","status":"published","published":"2026-10-07T08:00:13Z","modified":"2026-10-07T09:15:03.148626776Z","updated_at":"2026-11-02T15:53:32.570806Z"},{"id":"USN-8910-1","title":"libxml2 vulnerabilities","description":"Yirou Yang discovered that libxml2 incorrectly handled certain XML\ncatalogs. If a user or automated system was tricked into processing a\nspecially crafted XML catalog, an attacker could possibly use this issue to\ncause libxml2 to crash, resulting in a denial of service. (CVE-2026-76781)\n\nIt was discovered that libxml2 incorrectly handled certain large qualified\nnames, leading to a heap-based buffer overflow. An attacker could possibly\nuse this issue to cause libxml2 to crash, resulting in a denial of service,\nor possibly execute arbitrary code. (CVE-2026-86138)\n\nIt was discovered that libxml2 incorrectly handled escaping certain large\nURI strings. An attacker could possibly use this issue to cause libxml2 to\nuse excessive resources, leading to a denial of service. This issue only\naffected Ubuntu 26.04 LTS. (CVE-2026-86139)\n\nXudong Cao and Meng Xu discovered that libxml2 incorrectly handled certain\nlarge XPointer expressions, leading to a heap-based buffer overflow. An\nattacker could possibly use this issue to cause libxml2 to crash, resulting\nin a denial of service, or possibly execute arbitrary code.\n(CVE-2026-86142)\n\nXudong Cao and Meng Xu discovered that libxml2 did not check for integer\noverflows before passing output lengths to write callbacks. An attacker\ncould possibly use this issue to cause an application using libxml2 to\ncrash, resulting in a denial of service. (CVE-2026-86143)\n\nIt was discovered that libxml2 did not apply parser options, such as\ndisabling network access, when processing XInclude directives under certain\ncircumstances. An attacker could possibly use this issue to perform XML\nexternal entity injection or server-side request forgery attacks, or cause\na denial of service. (CVE-2026-86144)","status":"published","published":"2026-10-08T20:05:15Z","modified":"2026-10-09T07:57:36.005248021Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}