{
  "cveId": "CVE-2026-6390",
  "url": "https://patchblox.com/security/cve/CVE-2026-6390",
  "summary": "CVE-2026-6390 is fixed in 2 products on 1 platform, first by nano 6.2-1ubuntu0.2, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Nano: gnu nano: arbitrary memory writes, information disclosure, or denial of service via format string vulnerability in error handling.",
  "description": "A flaw was found in GNU nano\u0027s multi-buffer error message handling. When a user opens multiple files at startup and one triggers an ALERT-level error, a specially crafted filename containing printf format specifiers can be reinterpreted. This format string vulnerability may allow an attacker to achieve stack information disclosure, cause a denial of service (crash), or potentially perform arbitrary memory writes.",
  "published": "2026-07-22T22:16:00Z",
  "severity": "Moderate",
  "cvss": 6.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H",
  "cwe": "Use of Externally-Controlled Format String",
  "epss": 0.00154,
  "epssPercentile": 0.04561,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6390",
  "fixes": [
    {
      "platform": "linux",
      "product": "nano",
      "release": "Debian 14",
      "fixedVersion": "9.0-1",
      "fix": "DEBIAN-CVE-2026-6390",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-6390",
      "released": "2026-08-08T15:30:50Z"
    },
    {
      "platform": "linux",
      "product": "nano",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "6.2-1ubuntu0.2",
      "fix": "nano 6.2-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-nano-6.2-1ubuntu0.2",
      "released": "2026-06-24T14:07:38Z"
    },
    {
      "platform": "linux",
      "product": "nano",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "7.2-2ubuntu0.2",
      "fix": "nano 7.2-2ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-nano-7.2-2ubuntu0.2",
      "released": "2026-06-24T14:07:41Z"
    },
    {
      "platform": "linux",
      "product": "nano",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "8.4-1ubuntu0.1",
      "fix": "nano 8.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-nano-8.4-1ubuntu0.1",
      "released": "2026-06-24T14:07:44Z"
    },
    {
      "platform": "linux",
      "product": "nano",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.7.1-1ubuntu0.1",
      "fix": "nano 8.7.1-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-nano-8.7.1-1ubuntu0.1",
      "released": "2026-07-22T22:16:00Z"
    },
    {
      "platform": "linux",
      "product": "nano-tiny",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "6.2-1ubuntu0.2",
      "fix": "nano-tiny 6.2-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-nano-tiny-6.2-1ubuntu0.2",
      "released": "2026-06-24T14:07:38Z"
    },
    {
      "platform": "linux",
      "product": "nano-tiny",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "7.2-2ubuntu0.2",
      "fix": "nano-tiny 7.2-2ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-nano-tiny-7.2-2ubuntu0.2",
      "released": "2026-06-24T14:07:41Z"
    },
    {
      "platform": "linux",
      "product": "nano-tiny",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "8.4-1ubuntu0.1",
      "fix": "nano-tiny 8.4-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-nano-tiny-8.4-1ubuntu0.1",
      "released": "2026-06-24T14:07:44Z"
    },
    {
      "platform": "linux",
      "product": "nano-tiny",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.7.1-1ubuntu0.1",
      "fix": "nano-tiny 8.7.1-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-nano-tiny-8.7.1-1ubuntu0.1",
      "released": "2026-07-22T22:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}