{
  "cveId": "CVE-2025-39905",
  "url": "https://patchblox.com/security/cve/CVE-2025-39905",
  "summary": "CVE-2025-39905 is fixed in 31 products on 1 platform, first by DEBIAN-CVE-2025-39905, released October 1, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net: phylink: add lock for serializing concurrent pl-\u003Ephydev writes with resolver",
  "description": "In the Linux kernel, the following vulnerability has been resolved:\nnet: phylink: add lock for serializing concurrent pl-\u003Ephydev writes with resolver\nCurrently phylink_resolve() protects itself against concurrent\nphylink_bringup_phy() or phylink_disconnect_phy() calls which modify\npl-\u003Ephydev by relying on pl-\u003Estate_mutex.\nThe problem is that in phylink_resolve(), pl-\u003Estate_mutex is in a lock\ninversion state with pl-\u003Ephydev-\u003Elock. So pl-\u003Ephydev-\u003Elock needs to be\nacquired prior to pl-\u003Estate_mutex. But that requires dereferencing\npl-\u003Ephydev in the first place, and without pl-\u003Estate_mutex, that is\nracy.\nHence the reason for the extra lock. Currently it is redundant, but it\nwill serve a functional purpose once mutex_lock(\u0026phy-\u003Elock) will be\nmoved outside of the mutex_lock(\u0026pl-\u003Estate_mutex) section.\nAnother alternative considered would have been to let phylink_resolve()\nacquire the rtnl_mutex, which is also held when phylink_bringup_phy()\nand phylink_disconnect_phy() are called. But since phylink_disconnect_phy()\nruns under rtnl_lock(), it would deadlock with phylink_resolve() when\ncalling flush_work(\u0026pl-\u003Eresolve). Additionally, it would have been\nundesirable because it would have unnecessarily blocked many other call\npaths as well in the entire kernel, so the smaller-scoped lock was\npreferred.",
  "published": "2025-10-01T00:00:00Z",
  "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": 0.00111,
  "epssPercentile": 0.01356,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39905",
  "fixes": [
    {
      "platform": "linux",
      "product": "kernel",
      "release": "RHEL 10",
      "fixedVersion": "6.12.0-124.27.1.el10_1",
      "fix": "RHSA-2026:0453",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-0453",
      "released": "2025-12-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "rocky 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "RLSA-2026:0453",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-0453",
      "released": "2026-01-17T09:07:37Z"
    },
    {
      "platform": "linux",
      "product": "kernel-abi-stablelists",
      "release": "almalinux 10",
      "fixedVersion": "6.12.0-124.27.1.el10_1",
      "fix": "ALSA-2026:0453",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-abi-stablelists",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-core",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-cross-headers",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-core",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-devel",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-devel-matched",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
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    {
      "platform": "linux",
      "product": "kernel-debug-modules-core",
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      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules-extra",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-uki-virt",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel-matched",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-doc",
      "release": "almalinux 10",
      "fixedVersion": "6.12.0-124.27.1.el10_1",
      "fix": "ALSA-2026:0453",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-doc",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules",
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      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-core",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra-matched",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
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    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs-devel",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uki-virt",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uki-virt-addons",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
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      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
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      "product": "linux",
      "release": "Debian 14",
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      "fix": "DEBIAN-CVE-2025-39905",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-39905",
      "released": "2025-10-01T08:15:33Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rtla",
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      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "rv",
      "release": "ol 10",
      "fixedVersion": "0:6.12.0-124.27.1.el10_1",
      "fix": "ELSA-2026-0453",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-0453",
      "released": "2026-01-12T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}