{
  "cveId": "CVE-2025-39736",
  "url": "https://patchblox.com/security/cve/CVE-2025-39736",
  "summary": "CVE-2025-39736 is fixed in 31 products on 1 platform, first by ALAS2023-2025-1186, released September 10, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock  When netpoll is enabled, calling pr_warn_once() while holding kmemleak_lock in mem_pool_alloc() can cause a deadlock due to lock inversion with the netconsole subsystem.  This occurs because pr_warn_once() may trigger netpoll, which eventually leads to __alloc_skb() and back into kmemleak code, attempting to reacquire kmemleak_lock.  This is the path for the deadlock.  mem_pool_alloc()   -\u003E raw_spin_lock_irqsave(\u0026kmemleak_lock, flags);       -\u003E pr_warn_once()           -\u003E netconsole subsystem \t     -\u003E netpoll \t         -\u003E __alloc_skb \t\t   -\u003E __create_object \t\t     -\u003E raw_spin_lock_irqsave(\u0026kmemleak_lock, flags);  Fix this by setting a flag and issuing the pr_warn_once() after kmemleak_lock is released.",
  "published": "2025-09-10T05:43:00Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00133,
  "epssPercentile": 0.0288,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39736",
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
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      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2025-1186",
      "released": "2025-09-10T05:43:00Z"
    },
    {
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      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
    },
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      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
    },
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      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
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      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
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    {
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      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
    },
    {
      "platform": "linux",
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      "release": "amzn 2023",
      "fixedVersion": "1:6.1.150-174.273.amzn2023",
      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
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      "fix": "ALAS2023-2025-1186",
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      "fix": "ALAS2023-2025-1186",
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      "released": "2025-09-10T05:43:00Z"
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      "fix": "ALAS2023-2025-1186",
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      "fix": "ALAS2023-2025-1186",
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    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}