CVE-2023-53844 (GCVE-0-2023-53844)
Vulnerability from cvelistv5
Published
2025-12-09 01:30
Modified
2026-08-05 09:16
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/ttm: Don't leak a resource on swapout move error If moving the bo to system for swapout failed, we were leaking a resource. Fix.
References
Impacted products
Vendor Product Version
Linux Linux Version: bfa3357ef9abc9d56a2910222d2deeb9f15c91ff
Version: bfa3357ef9abc9d56a2910222d2deeb9f15c91ff
Version: bfa3357ef9abc9d56a2910222d2deeb9f15c91ff
Version: bfa3357ef9abc9d56a2910222d2deeb9f15c91ff
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/ttm/ttm_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af4e0ce2af8a8f0ff3b89702a1e18d8ec2c4a834",
              "status": "affected",
              "version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
              "versionType": "git"
            },
            {
              "lessThan": "f037f6038736bd038ddb9c72de979a08cc1ee3b5",
              "status": "affected",
              "version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
              "versionType": "git"
            },
            {
              "lessThan": "4a5b37ea6797d7a53e6dd004aa37e149f40199ce",
              "status": "affected",
              "version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
              "versionType": "git"
            },
            {
              "lessThan": "a590f03d8de7c4cb7ce4916dc7f2fd10711faabe",
              "status": "affected",
              "version": "bfa3357ef9abc9d56a2910222d2deeb9f15c91ff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/ttm/ttm_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.121",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.40",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.5",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/ttm: Don\u0027t leak a resource on swapout move error\n\nIf moving the bo to system for swapout failed, we were leaking\na resource. Fix."
        }
      ],
      "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 vulnerable path is reached only through local access to a DRM device node (/dev/dri/renderD* or card*) via GEM allocation/submission ioctls that drive TTM swapout; there is no network-facing component.\nAC:L - The attacker controls both preconditions \u2014 swapout is forced deterministically by allocating TTM pages past ttm_pages_limit (ttm_tt_populate loops on ttm_global_swapout), and the move failure is forced by keeping the GTT BO\u0027s fences unsignaled past the 15-second ttm_bo_wait_ctx timeout in amdgpu/radeon/nouveau, or by inducing -ENOMEM in dma_resv_reserve_fences under the same memory pressure. The sequence is repeatable at will, leaking one dangling resource per attempt.\nPR:L - Requires only an open DRM render node, which is granted to any logged-in desktop user, Android graphics-group app, or container with /dev/dri passed through; no capabilities and no root are needed.\nUI:N - The attacker performs all steps itself \u2014 BO allocation, GPU submission and memory pressure \u2014 with no action from any other user or victim process.\nS:U - The corruption is confined to the kernel\u0027s own TTM resource-manager structures within the same security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - The orphaned ttm_resource stays linked on the SYSTEM manager\u0027s LRU with a stale res-\u003ebo, so ttm_device_swapout, ttm_mem_evict_first and ttm_lru_bulk_move_tail read from a freed ttm_buffer_object whose slab the attacker can groom \u2014 a controllable use-after-free read primitive into kernel memory.\nI:H - The same dangling entry yields writes: ttm_bo_get_unless_zero performs an atomic increment into the freed object, list_del_init/list_bulk_move_tail splice attacker-influenced LRU pointers, and a groomed fake BO reaches the bo-\u003ebdev-\u003efuncs-\u003eswap_notify() and bo-\u003edestroy indirect calls, giving control-flow hijack potential.\nA:H - Beyond the unbounded kernel memory and man-\u003eusage accounting leak, the stale LRU entry oopses on the next swapout or eviction walk, and ttm_device_clear_lru_dma_mappings spins forever on it while holding bdev-\u003elru_lock (kref_get_unless_zero fails, then continue without list_del_init), producing a soft lockup and system hang."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:16:22.259Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af4e0ce2af8a8f0ff3b89702a1e18d8ec2c4a834"
        },
        {
          "url": "https://git.kernel.org/stable/c/f037f6038736bd038ddb9c72de979a08cc1ee3b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a5b37ea6797d7a53e6dd004aa37e149f40199ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/a590f03d8de7c4cb7ce4916dc7f2fd10711faabe"
        }
      ],
      "title": "drm/ttm: Don\u0027t leak a resource on swapout move error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53844",
    "datePublished": "2025-12-09T01:30:06.863Z",
    "dateReserved": "2025-12-09T01:27:17.827Z",
    "dateUpdated": "2026-08-05T09:16:22.259Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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