{
  "cveId": "CVE-2023-53522",
  "url": "https://patchblox.com/security/cve/CVE-2023-53522",
  "summary": "CVE-2023-53522 is fixed in 20 products on 1 platform, first by ALAS2023-2023-169, released April 27, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  cgroup,freezer: hold cpu_hotplug_lock before fre...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex  syzbot is reporting circular locking dependency between cpu_hotplug_lock and freezer_mutex, for commit f5d39b020809 (\u0022freezer,sched: Rewrite core freezer logic\u0022) replaced atomic_inc() in freezer_apply_state() with static_branch_inc() which holds cpu_hotplug_lock.  cpu_hotplug_lock =\u003E cgroup_threadgroup_rwsem =\u003E freezer_mutex    cgroup_file_write() {     cgroup_procs_write() {       __cgroup_procs_write() {         cgroup_procs_write_start() {           cgroup_attach_lock() {             cpus_read_lock() {               percpu_down_read(\u0026cpu_hotplug_lock);             }             percpu_down_write(\u0026cgroup_threadgroup_rwsem);           }         }         cgroup_attach_task() {           cgroup_migrate() {             cgroup_migrate_execute() {               freezer_attach() {                 mutex_lock(\u0026freezer_mutex);                 (...snipped...)               }             }           }         }         (...snipped...)       }     }   }  freezer_mutex =\u003E cpu_hotplug_lock    cgroup_file_write() {     freezer_write() {       freezer_change_state() {         mutex_lock(\u0026freezer_mutex);         freezer_apply_state() {           static_branch_inc(\u0026freezer_active) {             static_key_slow_inc() {               cpus_read_lock();               static_key_slow_inc_cpuslocked();               cpus_read_unlock();             }           }         }         mutex_unlock(\u0026freezer_mutex);       }     }   }  Swap locking order by moving cpus_read_lock() in freezer_apply_state() to before mutex_lock(\u0026freezer_mutex) in freezer_change_state().",
  "published": "2023-04-27T20:00:00Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00154,
  "epssPercentile": 0.04592,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.25-37.47",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53522",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53522",
      "released": "2025-10-01T12:15:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53522",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53522",
      "released": "2025-10-01T12:15:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-53522",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53522",
      "released": "2025-10-01T12:15:56Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.25-37.47.amzn2023",
      "fix": "ALAS2023-2023-169",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-169",
      "released": "2023-04-27T20:00:00Z"
    }
  ],
  "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"
  }
}