{
  "cveId": "CVE-2025-68193",
  "url": "https://patchblox.com/security/cve/CVE-2025-68193",
  "summary": "CVE-2025-68193 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68193, released December 16, 2025. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "drm/xe/guc: Add devm release action to safely tear down CT",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/xe/guc: Add devm release action to safely tear down CT  When a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE flag, the driver initiates TLB invalidation requests via the CTB mechanism while releasing the BO. However a premature release of the CTB BO can lead to system crashes, as observed in:  Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:h2g_write\u002B0x2f3/0x7c0 [xe] Call Trace:  guc_ct_send_locked\u002B0x8b/0x670 [xe]  xe_guc_ct_send_locked\u002B0x19/0x60 [xe]  send_tlb_invalidation\u002B0xb4/0x460 [xe]  xe_gt_tlb_invalidation_ggtt\u002B0x15e/0x2e0 [xe]  ggtt_invalidate_gt_tlb.part.0\u002B0x16/0x90 [xe]  ggtt_node_remove\u002B0x110/0x140 [xe]  xe_ggtt_node_remove\u002B0x40/0xa0 [xe]  xe_ggtt_remove_bo\u002B0x87/0x250 [xe]  Introduce a devm-managed release action during xe_guc_ct_init() and xe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before resource deallocation, preventing the use-after-free scenario.",
  "published": "2025-12-16T14:15:52Z",
  "severity": "Critical",
  "epss": 0.0022,
  "epssPercentile": 0.12631,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68193",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2025-68193",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68193",
      "released": "2025-12-16T14:15:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.8-1",
      "fix": "DEBIAN-CVE-2025-68193",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-68193",
      "released": "2025-12-16T14:15:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}