{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e1a30e1ab33fc522785d04bbf7e1b13a5c5c9175",
              "status": "affected",
              "version": "edc762a51c7181d6fe1e0837e2eb69afb406f98e",
              "versionType": "git"
            },
            {
              "lessThan": "b2426a211dba6432e32a2e70e9183c6e134475c6",
              "status": "affected",
              "version": "edc762a51c7181d6fe1e0837e2eb69afb406f98e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.7",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc6",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: Fix fence reference leak on queue teardown v2\n\nThe user mode queue keeps a pointer to the most recent fence in\nuserq-\u003elast_fence. This pointer holds an extra dma_fence reference.\n\nWhen the queue is destroyed, we free the fence driver and its xarray,\nbut we forgot to drop the last_fence reference.\n\nBecause of the missing dma_fence_put(), the last fence object can stay\nalive when the driver unloads. This leaves an allocated object in the\namdgpu_userq_fence slab cache and triggers\n\nThis is visible during driver unload as:\n\n  BUG amdgpu_userq_fence: Objects remaining on __kmem_cache_shutdown()\n  kmem_cache_destroy amdgpu_userq_fence: Slab cache still has objects\n  Call Trace:\n    kmem_cache_destroy\n    amdgpu_userq_fence_slab_fini\n    amdgpu_exit\n    __do_sys_delete_module\n\nFix this by putting userq-\u003elast_fence and clearing the pointer during\namdgpu_userq_fence_driver_free().\n\nThis makes sure the fence reference is released and the slab cache is\nempty when the module exits.\n\nv2: Update to only release userq-\u003elast_fence with dma_fence_put()\n    (Christian)\n\n(cherry picked from commit 8e051e38a8d45caf6a866d4ff842105b577953bb)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-31T11:42:29.137Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e1a30e1ab33fc522785d04bbf7e1b13a5c5c9175"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2426a211dba6432e32a2e70e9183c6e134475c6"
        }
      ],
      "title": "drm/amdgpu/userq: Fix fence reference leak on queue teardown v2",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23034",
    "datePublished": "2026-01-31T11:42:29.137Z",
    "dateReserved": "2026-01-13T15:37:45.942Z",
    "dateUpdated": "2026-01-31T11:42:29.137Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23034\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-31T12:16:06.710\",\"lastModified\":\"2026-01-31T12:16:06.710\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu/userq: Fix fence reference leak on queue teardown v2\\n\\nThe user mode queue keeps a pointer to the most recent fence in\\nuserq-\u003elast_fence. This pointer holds an extra dma_fence reference.\\n\\nWhen the queue is destroyed, we free the fence driver and its xarray,\\nbut we forgot to drop the last_fence reference.\\n\\nBecause of the missing dma_fence_put(), the last fence object can stay\\nalive when the driver unloads. This leaves an allocated object in the\\namdgpu_userq_fence slab cache and triggers\\n\\nThis is visible during driver unload as:\\n\\n  BUG amdgpu_userq_fence: Objects remaining on __kmem_cache_shutdown()\\n  kmem_cache_destroy amdgpu_userq_fence: Slab cache still has objects\\n  Call Trace:\\n    kmem_cache_destroy\\n    amdgpu_userq_fence_slab_fini\\n    amdgpu_exit\\n    __do_sys_delete_module\\n\\nFix this by putting userq-\u003elast_fence and clearing the pointer during\\namdgpu_userq_fence_driver_free().\\n\\nThis makes sure the fence reference is released and the slab cache is\\nempty when the module exits.\\n\\nv2: Update to only release userq-\u003elast_fence with dma_fence_put()\\n    (Christian)\\n\\n(cherry picked from commit 8e051e38a8d45caf6a866d4ff842105b577953bb)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/b2426a211dba6432e32a2e70e9183c6e134475c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e1a30e1ab33fc522785d04bbf7e1b13a5c5c9175\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}