{
  "cveId": "CVE-2026-17591",
  "url": "https://patchblox.com/security/cve/CVE-2026-17591",
  "summary": "CVE-2026-17591 is fixed in libarchive on 1 platform by DEBIAN-CVE-2026-17591 (version 3.8.9-1), released October 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Libarchive: libarchive: use-after-free via aliased mac metadata copy",
  "description": "A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.",
  "published": "2026-10-16T23:17:01Z",
  "severity": "Low",
  "cvss": 3.6,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L",
  "cwe": "Use After Free",
  "epss": 0.00154,
  "epssPercentile": 0.04512,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-17591",
  "fixes": [
    {
      "platform": "linux",
      "product": "libarchive",
      "release": "Debian 14",
      "fixedVersion": "3.8.9-1",
      "fix": "DEBIAN-CVE-2026-17591",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-17591",
      "released": "2026-10-17T16:04:57Z"
    }
  ],
  "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"
  }
}