{
  "cveId": "CVE-2026-77214",
  "url": "https://patchblox.com/security/cve/CVE-2026-77214",
  "summary": "CVE-2026-77214 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-77214, released October 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer",
  "description": "libexpat before commit 13c5f63 contains a heap buffer over-read vulnerability in xmlparse.c. XML_ParseBuffer advances the parse buffer end with parser-\u003Em_bufferEnd \u002B= len using a caller-supplied length that is not validated against the allocated buffer size, so repeated XML_ParseBuffer calls move m_bufferEnd past the end of the heap allocation and subsequent parsing reads out of bounds. Reaching this path requires a parse buffer to already be present; otherwise XML_ParseBuffer returns XML_ERROR_NO_BUFFER. A buffer is present after a prior call to XML_GetBuffer, either directly (the common case) or indirectly through a prior XML_Parse call that allocates the buffer internally. The over-read discloses adjacent heap memory to the calling application, recovering heap pointers, libc function pointers, and code pointers sufficient to defeat ASLR and build further exploitation primitives.",
  "published": "2026-10-07T14:35:42Z",
  "severity": "Important",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
  "cwe": "Out-of-bounds Read",
  "epss": 0.0032,
  "epssPercentile": 0.25114,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77214",
  "fixes": [
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.5.0-1\u002Bdeb12u5",
      "fix": "DEBIAN-CVE-2026-77214",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77214",
      "released": "2026-10-10T22:48:57Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.9.0-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-77214",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77214",
      "released": "2026-10-10T22:48:57Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 14",
      "fixedVersion": "2.9.0-1",
      "fix": "DEBIAN-CVE-2026-77214",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-77214",
      "released": "2026-10-10T22:48:57Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "RHEL 10",
      "fixedVersion": "2.7.3-1.el10_2.7",
      "fix": "RHSA-2026:88248",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-88248",
      "released": "2026-10-24T13:28:06Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "RHEL 8",
      "fixedVersion": "0:2.5.0-6.el8_10",
      "fix": "RHSA-2026:92323",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92323",
      "released": "2026-10-30T22:08:02Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "RHEL 9",
      "fixedVersion": "0:2.5.0-6.el9_8.7",
      "fix": "RHSA-2026:88247",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-88247",
      "released": "2026-10-24T13:28:06Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "almalinux 10",
      "fixedVersion": "2.7.3-1.el10_2.7",
      "fix": "ALSA-2026:88248",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-88248",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "almalinux 8",
      "fixedVersion": "2.5.0-6.el8_10",
      "fix": "ALSA-2026:92323",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-92323",
      "released": "2026-11-07T00:40:18Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "almalinux 9",
      "fixedVersion": "2.5.0-6.el9_8.7",
      "fix": "ALSA-2026:88247",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-88247",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "ol 10",
      "fixedVersion": "0:2.7.3-1.el10_2.7",
      "fix": "ELSA-2026-88248",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-88248",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "ol 8",
      "fixedVersion": "0:2.5.0-6.el8_10",
      "fix": "ELSA-2026-92323",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-92323",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "ol 9",
      "fixedVersion": "0:2.5.0-6.el9_8.7",
      "fix": "ELSA-2026-88247",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-88247",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.8.5-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22177-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22177-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "rocky 10",
      "fixedVersion": "0:2.7.3-1.el10_2.7",
      "fix": "RLSA-2026:88248",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-88248",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "rocky 8",
      "fixedVersion": "0:2.5.0-6.el8_10",
      "fix": "RLSA-2026:92323",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-92323",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "rocky 9",
      "fixedVersion": "0:2.5.0-6.el9_8.7",
      "fix": "RLSA-2026:88247",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-88247",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 15.6",
      "fixedVersion": "2.8.5-150400.3.40.1",
      "fix": "SUSE-SU-2026:4623-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4623-1",
      "released": "2026-11-07T00:41:11Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 15.7",
      "fixedVersion": "2.8.5-150700.3.15.1",
      "fix": "SUSE-SU-2026:4619-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4619-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 16.0",
      "fixedVersion": "2.8.5-160000.1.1",
      "fix": "SUSE-SU-2026:24469-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24469-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.5.0-6.el8_10",
      "fix": "RHSA-2026:92323",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92323",
      "released": "2026-10-30T22:08:02Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "RHEL 9",
      "fixedVersion": "0:2.5.0-6.el9_8.7",
      "fix": "RHSA-2026:88247",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-88247",
      "released": "2026-10-24T13:28:06Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "almalinux 8",
      "fixedVersion": "2.5.0-6.el8_10",
      "fix": "ALSA-2026:92323",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-92323",
      "released": "2026-11-07T00:40:18Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "almalinux 9",
      "fixedVersion": "2.5.0-6.el9_8.7",
      "fix": "ALSA-2026:88247",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-88247",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "ol 10",
      "fixedVersion": "0:2.7.3-1.el10_2.7",
      "fix": "ELSA-2026-88248",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-88248",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.5.0-6.el8_10",
      "fix": "ELSA-2026-92323",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-92323",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "ol 9",
      "fixedVersion": "0:2.5.0-6.el9_8.7",
      "fix": "ELSA-2026-88247",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-88247",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 10",
      "fixedVersion": "153.5.0-1.el10_2",
      "fix": "RHSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89758",
      "released": "2026-10-31T22:20:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 10",
      "fixedVersion": "153.5.0-1.el10_2",
      "fix": "ALSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89758",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 10",
      "fixedVersion": "0:153.5.0-1.0.1.el10_2",
      "fix": "ELSA-2026-89758",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89758",
      "released": "2026-11-07T00:59:15Z"
    },
    {
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      "product": "firefox",
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      "fixedVersion": "0:153.5.0-1.el10_2",
      "fix": "RLSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-89758",
      "released": "2026-11-07T00:39:51Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}