{
  "cveId": "CVE-2026-46025",
  "url": "https://patchblox.com/security/cve/CVE-2026-46025",
  "summary": "CVE-2026-46025 is fixed in 19 products on 1 platform, first by ALAS2023-2026-1754, released May 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/damon/core: fix damon_call() vs kdamond_fn()...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/damon/core: fix damon_call() vs kdamond_fn() exit race  Patch series \u0022mm/damon/core: fix damon_call()/damos_walk() vs kdmond exit race\u0022.  damon_call() and damos_walk() can leak memory and/or deadlock when they race with kdamond terminations.  Fix those.   This patch (of 2);  When kdamond_fn() main loop is finished, the function cancels all remaining damon_call() requests and unset the damon_ctx-\u003Ekdamond so that API callers and API functions themselves can know the context is terminated.  damon_call() adds the caller\u0027s request to the queue first.  After that, it shows if the kdamond of the damon_ctx is still running (damon_ctx-\u003Ekdamond is set).  Only if the kdamond is running, damon_call() starts waiting for the kdamond\u0027s handling of the newly added request.  The damon_call() requests registration and damon_ctx-\u003Ekdamond unset are protected by different mutexes, though.  Hence, damon_call() could race with damon_ctx-\u003Ekdamond unset, and result in deadlocks.  For example, let\u0027s suppose kdamond successfully finished the damon_call() requests cancelling.  Right after that, damon_call() is called for the context.  It registers the new request, and shows the context is still running, because damon_ctx-\u003Ekdamond unset is not yet done.  Hence the damon_call() caller starts waiting for the handling of the request.  However, the kdamond is already on the termination steps, so it never handles the new request.  As a result, the damon_call() caller threads infinitely waits.  Fix this by introducing another damon_ctx field, namely call_controls_obsolete.  It is protected by the damon_ctx-\u003Ecall_controls_lock, which protects damon_call() requests registration.  Initialize (unset) it in kdamond_fn() before letting damon_start() returns and set it just before the cancelling of remaining damon_call() requests is executed.  damon_call() reads the obsolete field under the lock and avoids adding a new request.  After this change, only requests that are guaranteed to be handled or cancelled are registered.  Hence the after-registration DAMON context termination check is no longer needed.  Remove it together.  Note that the deadlock will not happen when damon_call() is called for repeat mode request.  In tis case, damon_call() returns instead of waiting for the handling when the request registration succeeds and it shows the kdamond is running.  However, if the request also has dealloc_on_cancel, the request memory would be leaked.  The issue is found by sashiko [1].",
  "published": "2026-05-25T09:00:00Z",
  "severity": "medium",
  "cvss": 4.7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00088,
  "epssPercentile": 0.00356,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.30-61.116",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.30-61.116.amzn2023",
      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.4-1",
      "fix": "DEBIAN-CVE-2026-46025",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46025",
      "released": "2026-05-27T17:38:13Z"
    },
    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    },
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
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      "fix": "ALAS2023-2026-1754",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1754",
      "released": "2026-05-25T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}