{
  "cveId": "CVE-2026-80606",
  "url": "https://patchblox.com/security/cve/CVE-2026-80606",
  "summary": "CVE-2026-80606 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80606 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/xe/userptr: Hold notifier_lock for write on...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/xe/userptr: Hold notifier_lock for write on inject test path  When CONFIG_DRM_XE_USERPTR_INVAL_INJECT=y, xe_pt_svm_userptr_pre_commit() runs vma_check_userptr() with the svm notifier_lock taken for read. The test injection causes vma_check_userptr() to call xe_vma_userptr_force_invalidate(), which feeds into xe_vma_userptr_do_inval() with drm_gpusvm_ctx.in_notifier=true. That flag tells drm_gpusvm_unmap_pages() the caller already holds notifier_lock for write and only asserts the mode. Because the caller actually holds it for read, the assertion fires:    WARNING: drivers/gpu/drm/drm_gpusvm.c:1669 at \\            drm_gpusvm_unmap_pages\u002B0xd4/0x130 [drm_gpusvm_helper]   Call Trace:    xe_vma_userptr_do_inval\u002B0x40d/0xfd0 [xe]    xe_vma_userptr_invalidate_pass1\u002B0x3e6/0x8d0 [xe]    xe_vma_userptr_force_invalidate\u002B0xde/0x290 [xe]    vma_check_userptr.constprop.0\u002B0x1c6/0x220 [xe]    xe_pt_svm_userptr_pre_commit\u002B0x6a3/0xc60 [xe]    ...    xe_vm_bind_ioctl\u002B0x3a0a/0x4480 [xe]  Acquire notifier_lock for write in pre-commit when the inject Kconfig is enabled, via new helpers xe_pt_svm_userptr_notifier_lock()/_unlock(). Rename xe_svm_assert_held_read() to xe_svm_assert_held_read_or_inject_write() so it asserts the correct mode under each build configuration. Production builds (CONFIG_DRM_XE_USERPTR_INVAL_INJECT=n) keep the existing read-mode behavior bit-for-bit.  (cherry picked from commit 80ccbd97ffee8ad2e73167d826fe7be548364365)",
  "published": "2026-08-28T08:16:44Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00173,
  "epssPercentile": 0.06777,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-80606",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80606",
      "released": "2026-08-29T00:46:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}