{
  "cveId": "CVE-2026-89570",
  "url": "https://patchblox.com/security/cve/CVE-2026-89570",
  "summary": "CVE-2026-89570 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89570 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  cxl/mce: Make the MCE notifier per-region  Flavi...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  cxl/mce: Make the MCE notifier per-region  Flavien Solt reported lifetime issues with the CXL MCE notifier, which can lead to NULL dereferences and use-after-free in the MCE handler. The notifier was registered per memory device and stored in \u0027struct cxl_memdev_state\u0027, even though it only needs the region state (the region\u0027s SPA range and its extended linear cache size).  Instead of keeping the memory device and endpoint alive, the correct fix is to move the notifier into \u0027struct cxl_region\u0027 and register it from cxl_region_probe() as it should be a per-region notifier. Setup the registration to only happen for regions that have an extended linear cache as that is the only current usage.  Remove cxl_port_get_spa_cache_alias() as it is now dead code.  [ dj: Update dev_warn() when notifier fails due to kconfig. (Ben) ]",
  "published": "2026-09-11T20:19:41Z",
  "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": 0.00168,
  "epssPercentile": 0.06212,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89570",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89570",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}