{
  "cveId": "CVE-2026-41401",
  "url": "https://patchblox.com/security/cve/CVE-2026-41401",
  "summary": "CVE-2026-41401 is fixed in 3 products on 1 platform, first by libyang3 3.13.5-2ubuntu0.1, released May 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libyang - Heap Use-After-Free Write in XML Metadata Parsing",
  "description": "libyang before 5.4.3 contains a heap use-after-free write vulnerability in lyd_parser_set_data_flags that incorrectly updates metadata list pointers when freeing non-head default metadata entries. Attackers can trigger this vulnerability by submitting crafted YANG XML documents with specific metadata attributes to applications parsing untrusted XML data, causing process crashes or potential code execution.",
  "published": "2026-05-26T08:16:00Z",
  "severity": "Important",
  "cvss": 6.5,
  "cwe": "Use After Free",
  "epss": 0.00673,
  "epssPercentile": 0.52371,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41401",
  "fixes": [
    {
      "platform": "linux",
      "product": "libyang",
      "release": "Debian 14",
      "fixedVersion": "6.4.13-1",
      "fix": "DEBIAN-CVE-2026-41401",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-41401",
      "released": "2026-05-26T15:16:35Z"
    },
    {
      "platform": "linux",
      "product": "libyang",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.1.148-160000.4.1",
      "fix": "OPENSUSE-SU-2026:21113-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21113-1",
      "released": "2026-06-20T06:58:54Z"
    },
    {
      "platform": "linux",
      "product": "libyang",
      "release": "sles 15.6",
      "fixedVersion": "2.1.55-150500.3.5.1",
      "fix": "SUSE-SU-2026:2335-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2335-1",
      "released": "2026-06-10T08:43:17Z"
    },
    {
      "platform": "linux",
      "product": "libyang",
      "release": "sles 15.7",
      "fixedVersion": "2.1.148-150700.3.5.1",
      "fix": "SUSE-SU-2026:2337-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2337-1",
      "released": "2026-06-10T08:43:47Z"
    },
    {
      "platform": "linux",
      "product": "libyang",
      "release": "sles 16.0",
      "fixedVersion": "2.1.148-160000.4.1",
      "fix": "SUSE-SU-2026:22208-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22208-1",
      "released": "2026-06-20T06:56:16Z"
    },
    {
      "platform": "linux",
      "product": "libyang3",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.13.5-2ubuntu0.1",
      "fix": "libyang3 3.13.5-2ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libyang3-3.13.5-2ubuntu0.1",
      "released": "2026-05-26T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libyang3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.13.6-1ubuntu0.1",
      "fix": "libyang3 3.13.6-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libyang3-3.13.6-1ubuntu0.1",
      "released": "2026-05-26T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libyang3-tools",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.13.5-2ubuntu0.1",
      "fix": "libyang3-tools 3.13.5-2ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libyang3-tools-3.13.5-2ubuntu0.1",
      "released": "2026-05-26T08:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libyang3-tools",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.13.6-1ubuntu0.1",
      "fix": "libyang3-tools 3.13.6-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libyang3-tools-3.13.6-1ubuntu0.1",
      "released": "2026-05-26T08:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}