{
  "cveId": "CVE-2026-74692",
  "url": "https://patchblox.com/security/cve/CVE-2026-74692",
  "summary": "CVE-2026-74692 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-74692, released August 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net/smc: fix TOCTOU race between smc_listen_out() and listener close",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: fix TOCTOU race between smc_listen_out() and listener close  smc_listen_out() reads lsmc-\u003Esk.sk_state without the listener lock, then acquires lock_sock_nested() only after the check passes. This opens a window where smc_close_active() can transition the listener to SMC_CLOSED, call smc_close_cleanup_listen() to drain the accept queue, and release the lock, all between the lockless read and the delayed lock acquisition:    smc_listen_work (smc_hs_wq)          smc_close_active()   -------------------------------      -------------------------   release_sock(child)   if (sk_state == SMC_LISTEN) TRUE                                         lock_sock(listener)                                         sk_state = SMC_CLOSED                                         smc_close_cleanup_listen()                                         release_sock(listener)                                         flush_work(tcp_listen_work)   lock_sock_nested(listener)   smc_accept_enqueue(listener, child) /* child enqueued on dead listener */  smc_close_active() flushes only tcp_listen_work. Work items already dispatched onto smc_hs_wq for the CLC handshake continue running unguarded. smc_accept_enqueue() takes a sock_hold() on the child that is never released, so the child smc_sock, its clcsock, and the reference all leak. A remote peer that opens TCP connections while the server calls close() can exhaust kernel memory.  Move lock_sock_nested() to before the sk_state check so that the test and the enqueue are atomic under the listener lock.",
  "published": "2026-08-22T16:16:43Z",
  "severity": "Moderate",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0049,
  "epssPercentile": 0.42379,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74692",
  "fixes": [
    {
      "platform": "linux",
      "product": "dtb-aarch64",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.81.1",
      "fix": "SUSE-SU-2026:4254-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4254-1",
      "released": "2026-10-07T22:31:36Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.81.1",
      "fix": "SUSE-SU-2026:4254-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4254-1",
      "released": "2026-10-07T22:31:36Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
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      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
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      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
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    {
      "platform": "linux",
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      "fix": "SUSE-SU-2026:4254-1",
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      "released": "2026-10-07T22:31:36Z"
    },
    {
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      "product": "kernel-default",
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      "fix": "SUSE-SU-2026:24197-1",
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      "released": "2026-11-07T00:44:01Z"
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      "fix": "OPENSUSE-SU-2026:22091-1",
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      "released": "2026-11-07T00:47:19Z"
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      "fix": "SUSE-SU-2026:24235-1",
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      "released": "2026-11-07T00:44:01Z"
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    {
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      "product": "kernel-docs",
      "release": "opensuse-leap 16.0",
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      "fix": "OPENSUSE-SU-2026:22091-1",
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    {
      "platform": "linux",
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      "release": "sles 15.7",
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      "fix": "SUSE-SU-2026:4254-1",
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      "released": "2026-10-07T22:31:36Z"
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      "fix": "SUSE-SU-2026:24235-1",
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    {
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      "product": "kernel-kvmsmall",
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      "fix": "OPENSUSE-SU-2026:22091-1",
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      "fix": "SUSE-SU-2026:24235-1",
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      "released": "2026-11-07T00:44:01Z"
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    {
      "platform": "linux",
      "product": "kernel-livepatch-SLE15-SP7-RT_Update_20",
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      "fix": "SUSE-SU-2026:4120-1",
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      "released": "2026-08-27T00:27:02Z"
    }
  ],
  "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"
  }
}