{
  "cveId": "CVE-2026-46154",
  "url": "https://patchblox.com/security/cve/CVE-2026-46154",
  "summary": "CVE-2026-46154 is fixed in 19 products on 1 platform, first by ALAS2023-2026-1866, released June 22, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Read scx_root under scx_cgroup_ops_rw...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  sched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters  scx_group_set_{weight,idle,bandwidth}() cache scx_root before acquiring scx_cgroup_ops_rwsem, so the pointer can be stale by the time the op runs. If the loaded scheduler is disabled and freed (via RCU work) and another is enabled between the naked load and the rwsem acquire, the reader sees scx_cgroup_enabled=true (the new scheduler\u0027s) but dereferences the freed one - UAF on SCX_HAS_OP(sch, ...) / SCX_CALL_OP(sch, ...).  scx_cgroup_enabled is toggled only under scx_cgroup_ops_rwsem write (scx_cgroup_{init,exit}), so reading scx_root inside the rwsem read section correlates @sch with the enabled snapshot.",
  "published": "2026-05-28T10:16:31Z",
  "severity": "high",
  "cvss": 7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.0012,
  "epssPercentile": 0.01829,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.33-63.124",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.7-1",
      "fix": "DEBIAN-CVE-2026-46154",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-46154",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.33-63.124.amzn2023",
      "fix": "ALAS2023-2026-1866",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1866",
      "released": "2026-06-22T09:00:00Z"
    }
  ],
  "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"
  }
}