{
  "cveId": "CVE-2026-68174",
  "url": "https://patchblox.com/security/cve/CVE-2026-68174",
  "summary": "CVE-2026-68174 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-68174, released August 11, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  tracing: Fix union collision of module and refcn...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tracing: Fix union collision of module and refcnt for dynamic events  In \u0027struct trace_event_call\u0027, the \u0027module\u0027 pointer and the \u0027refcnt\u0027 atomic variable share the same memory space in a union. For dynamic events, the union member is \u0027refcnt\u0027, which acts as an active reference counter.  When a dynamic event (such as kprobe, uprobe, fprobe, eprobe, or wprobe) has a non-zero reference count (e.g. due to active event triggers or perf attachments), its \u0027call-\u003Emodule\u0027 evaluates to a small non-zero integer instead of NULL.  When filtering or setting events for a specific module (e.g., writing \u0027:mod:\u003Cmodule\u003E\u0027 to \u0027set_event\u0027), the code in \u0027__ftrace_set_clr_event_nolock()\u0027 and \u0027update_event_fields()\u0027 reads \u0027call-\u003Emodule\u0027 directly without checking whether the event is dynamic. This causes the kernel to treat the small integer (refcnt) as a \u0027struct module\u0027 pointer, leading to a NULL/invalid pointer dereference (Oops) when dereferencing the module name.  Fix this by ensuring that the \u0027TRACE_EVENT_FL_DYNAMIC\u0027 flag is checked before treating \u0027call-\u003Emodule\u0027 as a valid pointer in these code paths.",
  "published": "2026-08-10T13:20:04Z",
  "severity": "important",
  "epss": 0.00198,
  "epssPercentile": 0.09631,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.44-99.149",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.6-1",
      "fix": "DEBIAN-CVE-2026-68174",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-68174",
      "released": "2026-08-11T16:03:09Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.44-99.149.amzn2023",
      "fix": "ALAS2023-2026-2106",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2106",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}