CVE-2025-68193 (GCVE-0-2025-68193)
Vulnerability from cvelistv5
Published
2025-12-16 13:43
Modified
2025-12-16 13:43
Severity ?
Summary
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+0x2f3/0x7c0 [xe] Call Trace: guc_ct_send_locked+0x8b/0x670 [xe] xe_guc_ct_send_locked+0x19/0x60 [xe] send_tlb_invalidation+0xb4/0x460 [xe] xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe] ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe] ggtt_node_remove+0x110/0x140 [xe] xe_ggtt_node_remove+0x40/0xa0 [xe] xe_ggtt_remove_bo+0x87/0x250 [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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc.c",
            "drivers/gpu/drm/xe/xe_guc_ct.c",
            "drivers/gpu/drm/xe/xe_guc_ct.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "52faa05fcd9f78af99abebe30a4b7b444744c991",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "ee4b32220a6b41e71512e8804585325e685456ba",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/xe/xe_guc.c",
            "drivers/gpu/drm/xe/xe_guc_ct.c",
            "drivers/gpu/drm/xe/xe_guc_ct.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc: Add devm release action to safely tear down CT\n\nWhen a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE\nflag, the driver initiates TLB invalidation requests via the CTB mechanism\nwhile releasing the BO. However a premature release of the CTB BO can lead\nto system crashes, as observed in:\n\nOops: Oops: 0000 [#1] SMP NOPTI\nRIP: 0010:h2g_write+0x2f3/0x7c0 [xe]\nCall Trace:\n guc_ct_send_locked+0x8b/0x670 [xe]\n xe_guc_ct_send_locked+0x19/0x60 [xe]\n send_tlb_invalidation+0xb4/0x460 [xe]\n xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]\n ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]\n ggtt_node_remove+0x110/0x140 [xe]\n xe_ggtt_node_remove+0x40/0xa0 [xe]\n xe_ggtt_remove_bo+0x87/0x250 [xe]\n\nIntroduce a devm-managed release action during xe_guc_ct_init() and\nxe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before\nresource deallocation, preventing the use-after-free scenario."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T13:43:19.702Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba"
        }
      ],
      "title": "drm/xe/guc: Add devm release action to safely tear down CT",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68193",
    "datePublished": "2025-12-16T13:43:19.702Z",
    "dateReserved": "2025-12-16T13:41:40.253Z",
    "dateUpdated": "2025-12-16T13:43:19.702Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68193\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:52.020\",\"lastModified\":\"2025-12-18T15:08:25.907\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/xe/guc: Add devm release action to safely tear down CT\\n\\nWhen a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE\\nflag, the driver initiates TLB invalidation requests via the CTB mechanism\\nwhile releasing the BO. However a premature release of the CTB BO can lead\\nto system crashes, as observed in:\\n\\nOops: Oops: 0000 [#1] SMP NOPTI\\nRIP: 0010:h2g_write+0x2f3/0x7c0 [xe]\\nCall Trace:\\n guc_ct_send_locked+0x8b/0x670 [xe]\\n xe_guc_ct_send_locked+0x19/0x60 [xe]\\n send_tlb_invalidation+0xb4/0x460 [xe]\\n xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe]\\n ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe]\\n ggtt_node_remove+0x110/0x140 [xe]\\n xe_ggtt_node_remove+0x40/0xa0 [xe]\\n xe_ggtt_remove_bo+0x87/0x250 [xe]\\n\\nIntroduce a devm-managed release action during xe_guc_ct_init() and\\nxe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before\\nresource deallocation, preventing the use-after-free scenario.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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