{
  "cveId": "CVE-2026-99236",
  "url": "https://patchblox.com/security/cve/CVE-2026-99236",
  "summary": "CVE-2026-99236 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99236, released November 3, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "tracing: Reject incomplete event filter expressions",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tracing: Reject incomplete event filter expressions  A non-empty expression normally finishes in predicate_parse()\u0027s inner loop, which resolves the pending logical operators before jumping to finalization. If the input ends after an operator, possibly followed by unary \u0027!\u0027 tokens, the outer loop instead falls through with unresolved operator state.  For example, \u0022common_pid == 1 || common_pid == 2 \u0026\u0026\u0022 leaves prog[0].target equal to -1. The second pass then reads prog[-1] before the forward-jump check can reject it. Depending on adjacent slab contents, it can also copy an out-of-bounds word into a branch target that passes the forward-only check. A self-targeted perf tracepoint counting event can reach this path through PERF_EVENT_IOC_SET_FILTER.  Reject the outer-loop fallthrough when a predicate has already been parsed. This ensures that non-empty expressions only reach finalization after the inner loop has resolved their operators. Keep the existing no-filter error for input that has no predicates. Add a regression test for trailing logical operators and unary negations.",
  "published": "2026-11-02T16:17:49Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00126,
  "epssPercentile": 0.02302,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99236",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-1",
      "fix": "DEBIAN-CVE-2026-99236",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99236",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.14-1",
      "fix": "DEBIAN-CVE-2026-99236",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99236",
      "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"
  }
}