CVE-2021-47142 (GCVE-0-2021-47142)
Vulnerability from cvelistv5
Published
2024-03-25 09:07
Modified
2026-08-05 08:46
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a use-after-free looks like we forget to set ttm->sg to NULL. Hit panic below [ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 1235.989074] Call Trace: [ 1235.991751] sg_free_table+0x17/0x20 [ 1235.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm] [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] [ 1236.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] [ 1236.046912] kfd_ioctl+0x463/0x690 [amdgpu]
References
Impacted products
Vendor Product Version
Linux Linux Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
Version: d38ceaf99ed015f2a0b9af3499791bd3a3daae21
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.924Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47142",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:55:00.553933Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:15.288Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0707c3fea8102d211631ba515ef2159707561b0d",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "3293cf3513d69f00c14d43e2020826d45ea0e46a",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "952ab3f9f48eb0e8050596d41951cf516be6b122",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "a849e218556f932576c0fb1c5a88714b61709a17",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "7398c2aab4da960761ec182d04d6d5abbb4a226e",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "f98cdf084405333ee2f5be548a91b2d168e49276",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "d4ea141fd4b40636a8326df5a377d9c5cf9b3faa",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "1e5c37385097c35911b0f8a0c67ffd10ee1af9a2",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.235",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.193",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.124",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.271",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.271",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.235",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.193",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.124",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.42",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.9",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix a use-after-free\n\nlooks like we forget to set ttm-\u003esg to NULL.\nHit panic below\n\n[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI\n[ 1235.989074] Call Trace:\n[ 1235.991751]  sg_free_table+0x17/0x20\n[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]\n[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]\n[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]\n[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]\n[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]\n[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]\n[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]\n[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]\n[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]\n[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached through local ioctls on /dev/kfd (kfd_ioctl_alloc_memory_of_gpu with KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) or the DRM render-node AMDGPU_GEM_USERPTR path, not via network packet processing.\nAC:L - An unprivileged local attacker can reliably drive the userptr populate/unpopulate/destroy sequence via KFD/DRM ioctls and control concurrent GPU memory operations; no conditions outside attacker influence are required to hit the dangling ttm-\u003esg use.\nPR:L - /dev/kfd and DRM render nodes are mode 0660 group render (with uaccess for seated users); kfd_open and the GEM userptr ioctl perform no capability checks, so a normal unprivileged render-group user can reach the vulnerable code.\nUI:N - Exploitation requires only the attacker\u2019s own ioctl calls against the GPU device nodes; no separate victim action is needed.\nS:U - The vulnerability corrupts kernel memory within the host kernel\u2019s authority and enables local privilege escalation, but does not cross a VM/IOMMU/sandbox boundary.\nC:H - This is a use-after-free of the kmalloc\u2019d sg_table: after kfree(ttm-\u003esg) without NULLing, later unbind reads the freed object, and reclaim/spray of that slab can expose arbitrary kernel memory contents.\nI:H - Use of the reclaimed dangling ttm-\u003esg in sg_free_table() yields an attacker-controlled scatterlist walk/arbitrary free primitive, which is a standard path to arbitrary kernel write and control-flow hijacking.\nA:H - The demonstrated failure is a kernel general protection fault/oops in sg_free_table during amdgpu_ttm_backend_unbind, so availability impact is complete host crash."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:46:18.601Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a"
        },
        {
          "url": "https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122"
        },
        {
          "url": "https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17"
        },
        {
          "url": "https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e"
        },
        {
          "url": "https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276"
        },
        {
          "url": "https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2"
        }
      ],
      "title": "drm/amdgpu: Fix a use-after-free",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47142",
    "datePublished": "2024-03-25T09:07:40.374Z",
    "dateReserved": "2024-03-04T18:12:48.842Z",
    "dateUpdated": "2026-08-05T08:46:18.601Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:39.924Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47142\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:55:00.553933Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:15.736Z\"}}], \"cna\": {\"title\": \"drm/amdgpu: Fix a use-after-free\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The bug is reached through local ioctls on /dev/kfd (kfd_ioctl_alloc_memory_of_gpu with KFD_IOC_ALLOC_MEM_FLAGS_USERPTR) or the DRM render-node AMDGPU_GEM_USERPTR path, not via network packet processing.\\nAC:L - An unprivileged local attacker can reliably drive the userptr populate/unpopulate/destroy sequence via KFD/DRM ioctls and control concurrent GPU memory operations; no conditions outside attacker influence are required to hit the dangling ttm-\u003esg use.\\nPR:L - /dev/kfd and DRM render nodes are mode 0660 group render (with uaccess for seated users); kfd_open and the GEM userptr ioctl perform no capability checks, so a normal unprivileged render-group user can reach the vulnerable code.\\nUI:N - Exploitation requires only the attacker\\u2019s own ioctl calls against the GPU device nodes; no separate victim action is needed.\\nS:U - The vulnerability corrupts kernel memory within the host kernel\\u2019s authority and enables local privilege escalation, but does not cross a VM/IOMMU/sandbox boundary.\\nC:H - This is a use-after-free of the kmalloc\\u2019d sg_table: after kfree(ttm-\u003esg) without NULLing, later unbind reads the freed object, and reclaim/spray of that slab can expose arbitrary kernel memory contents.\\nI:H - Use of the reclaimed dangling ttm-\u003esg in sg_free_table() yields an attacker-controlled scatterlist walk/arbitrary free primitive, which is a standard path to arbitrary kernel write and control-flow hijacking.\\nA:H - The demonstrated failure is a kernel general protection fault/oops in sg_free_table during amdgpu_ttm_backend_unbind, so availability impact is complete host crash.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"0707c3fea8102d211631ba515ef2159707561b0d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"3293cf3513d69f00c14d43e2020826d45ea0e46a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"952ab3f9f48eb0e8050596d41951cf516be6b122\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"a849e218556f932576c0fb1c5a88714b61709a17\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"7398c2aab4da960761ec182d04d6d5abbb4a226e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"f98cdf084405333ee2f5be548a91b2d168e49276\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\", \"lessThan\": \"1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.193\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.124\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.42\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d\"}, {\"url\": \"https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a\"}, {\"url\": \"https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122\"}, {\"url\": \"https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17\"}, {\"url\": \"https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e\"}, {\"url\": \"https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276\"}, {\"url\": \"https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\"}, {\"url\": \"https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: Fix a use-after-free\\n\\nlooks like we forget to set ttm-\u003esg to NULL.\\nHit panic below\\n\\n[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI\\n[ 1235.989074] Call Trace:\\n[ 1235.991751]  sg_free_table+0x17/0x20\\n[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]\\n[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]\\n[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]\\n[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]\\n[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]\\n[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]\\n[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]\\n[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]\\n[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]\\n[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.271\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.271\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.235\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.193\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.124\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.42\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.9\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:46:18.601Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47142\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:46:18.601Z\", \"dateReserved\": \"2024-03-04T18:12:48.842Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-25T09:07:40.374Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.