{
  "cveId": "CVE-2026-99158",
  "url": "https://patchblox.com/security/cve/CVE-2026-99158",
  "summary": "CVE-2026-99158 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99158, released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ring-buffer: Fix false warning in ring_buffer_ma...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ring-buffer: Fix false warning in ring_buffer_map_get_reader()  The mmap reader can warn when it catches up with a writer that is still committing events. rb_get_reader_page() returns NULL in this case, but ring_buffer_map_get_reader() treats that result as an error.  The initial rb_per_cpu_empty() check filters out an empty buffer, but it does not guarantee that the next reader page has committed data. Writers do not take reader_lock and can advance commit_page before publishing the committed length on the new page. rb_get_reader_page() can swap to that page, catch up with the writer and return NULL.  Handle NULL through the existing no-data exit without warning. Remove the caller\u0027s reader_page == commit_page check as well, since the reader-page helper already handles that case. The existing metadata update and return path remain in place.",
  "published": "2026-10-28T11:17:36Z",
  "severity": "",
  "epss": 0.00168,
  "epssPercentile": 0.06225,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-99158",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99158",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.13-1",
      "fix": "DEBIAN-CVE-2026-99158",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99158",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}