CVE-2023-54254 (GCVE-0-2023-54254)
Vulnerability from cvelistv5
Published
2025-12-30 12:15
Modified
2026-08-05 09:18
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 eviction error On eviction errors other than -EMULTIHOP we were leaking a resource. Fix. v2: - Avoid yet another goto (Andi Shyti)
References
Impacted products
Vendor Product Version
Linux Linux Version: 403797925768d9fa870f5b1ebcd20016b397083b
Version: 403797925768d9fa870f5b1ebcd20016b397083b
Version: 403797925768d9fa870f5b1ebcd20016b397083b
Version: 403797925768d9fa870f5b1ebcd20016b397083b
Version: 6c68fbafb9cd13e13476043fd9f6e10f792f685a
Version: 5.14.6   ≤
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/ttm/ttm_bo.c"
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        },
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.15"
            },
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            },
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              "status": "unaffected",
              "version": "6.1.43",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                  "vulnerable": true
                },
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                  "vulnerable": true
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              ],
              "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 eviction error\n\nOn eviction errors other than -EMULTIHOP we were leaking a resource.\nFix.\n\nv2:\n- Avoid yet another goto (Andi Shyti)"
        }
      ],
      "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 DRM ioctls (GEM create / command submission / buffer validation) on a local device node such as /dev/dri/renderD128. There is no network-facing consumer of ttm_bo_evict().\nAC:L - The attacker controls both preconditions: it fills VRAM/GTT with its own BOs to force the eviction path, then delivers a signal to its own ioctl thread so the interruptible wait inside the driver move callback returns -ERESTARTSYS, a non-EMULTIHOP error that leaks the resource. This is deterministic and can be repeated in a tight loop.\nPR:L - An ordinary unprivileged local user needs only an open FD on a DRM render node, which is granted to the render/video group on desktops, to every GPU-using app on Android and ChromeOS, and to containers with GPU passthrough. No capability or root access is involved.\nUI:N - The attacking process drives allocation, eviction and signal delivery entirely on its own. No action by any other user is required.\nS:U - The leaked resource, the dangling res-\u003ebo pointer, and all subsequent corruption remain within the kernel\u0027s own security authority. No hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The orphaned ttm_resource retains a dangling res-\u003ebo to a freed ttm_buffer_object that later LRU walkers dereference without any validity check, giving a use-after-free whose freed-object contents the attacker can groom via heap spray to read kernel memory through the bo-\u003ebase.resv / bo-\u003ebdev / bo-\u003eresource pointer chains.\nI:H - The same use-after-free yields write and control-flow primitives: ttm_bo_evict_swapout_allowable() calls dma_resv_trylock() through an attacker-controlled bo-\u003ebase.resv pointer and indirect-calls bo-\u003ebdev-\u003efuncs-\u003eeviction_valuable() read from reclaimed slab memory.\nA:H - Each triggered error permanently leaks a VRAM/GTT range and an LRU entry, so repeated invocation exhausts GPU memory device-wide and denies service to all users including the display server; additionally the never-empty LRU makes ttm_resource_manager_evict_all() spin forever at suspend/unload, and the use-after-free crashes the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:18:27.491Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7738335d73d0686ec8995e0448e5d1b48cffb2a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9c44738cb1f537b177cc1beabcf6913690460cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/6aea0032380bbb1efebd598ad733d16925167921"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532"
        }
      ],
      "title": "drm/ttm: Don\u0027t leak a resource on eviction error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54254",
    "datePublished": "2025-12-30T12:15:50.163Z",
    "dateReserved": "2025-12-30T12:06:44.515Z",
    "dateUpdated": "2026-08-05T09:18:27.491Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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