{
  "cveId": "CVE-2026-72423",
  "url": "https://patchblox.com/security/cve/CVE-2026-72423",
  "summary": "CVE-2026-72423 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-72423, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "bpf: Guard conntrack opts error writes",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Guard conntrack opts error writes  The conntrack lookup and allocation kfuncs take an opts pointer together with an opts__sz argument. The verifier checks only the memory range described by opts__sz, but the wrappers unconditionally write opts-\u003Eerror whenever the internal lookup or allocation helper returns an error.  For an invalid size smaller than the end of opts-\u003Eerror, that write can land outside the verifier-checked range. Keep returning NULL for invalid arguments, but only report the error through opts-\u003Eerror when the supplied size includes the field.  This preserves error reporting for the supported 12-byte and 16-byte layouts, and for other invalid sizes that still include opts-\u003Eerror.",
  "published": "2026-08-15T06:22:16Z",
  "severity": "Moderate",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00165,
  "epssPercentile": 0.05715,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72423",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-72423",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72423",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-72423",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72423",
      "released": "2026-08-15T22:38:55Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}