{
  "cveId": "CVE-2026-53303",
  "url": "https://patchblox.com/security/cve/CVE-2026-53303",
  "summary": "CVE-2026-53303 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-53303, released June 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()  In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi-\u003Esb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data.  Fix this by holding sb_lock around the entire extension list read and format operation.",
  "published": "2026-06-26T20:17:23Z",
  "severity": "Important",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00167,
  "epssPercentile": 0.0595,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53303",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.176-1",
      "fix": "DEBIAN-CVE-2026-53303",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53303",
      "released": "2026-06-27T17:39:39Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.94-1",
      "fix": "DEBIAN-CVE-2026-53303",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53303",
      "released": "2026-06-27T17:39:39Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.10-1",
      "fix": "DEBIAN-CVE-2026-53303",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53303",
      "released": "2026-06-27T17:39:39Z"
    }
  ],
  "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"
  }
}