{
  "cveId": "CVE-2026-76844",
  "url": "https://patchblox.com/security/cve/CVE-2026-76844",
  "summary": "CVE-2026-76844 is fixed in zlib on 1 platform by DEBIAN-CVE-2026-76844 (version 1:1.3.dfsg\u002Breally1.3.2-4), released August 24, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "zlib 1.2.11 through 1.3.2 Heap Buffer Overflow via Stale gzwrite Pointer After Failed Write",
  "description": "zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write() fails, gz_write() returns without resetting strm.next_in, leaving it pointed at the caller\u0027s buffer. A later gz* write call then derives a position from the stale pointer and writes past a heap allocation; any write() failure reaches it, including EPIPE on a blocking descriptor, and in versions before 1.3.1.2 the failed write must be followed by a gzclearerr() call.",
  "published": "2026-08-24T14:17:02Z",
  "severity": "Moderate",
  "cvss": 7.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H",
  "cwe": "Out-of-bounds Write",
  "epss": 0.00592,
  "epssPercentile": 0.48544,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-76844",
  "fixes": [
    {
      "platform": "linux",
      "product": "zlib",
      "release": "Debian 14",
      "fixedVersion": "1:1.3.dfsg\u002Breally1.3.2-4",
      "fix": "DEBIAN-CVE-2026-76844",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-76844",
      "released": "2026-08-24T14:17:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}