CVE-2022-50528 (GCVE-0-2022-50528)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:19 – Updated: 2026-10-15 21:41
VLAI
Title
drm/amdkfd: Fix memory leakage
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix memory leakage This patch fixes potential memory leakage and seg fault in _gpuvm_import_dmabuf() function
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 21:31 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d4ec4bdc0bd5ad352854473ba4dcbdb39fd5bfdd , < 8876793e56ec69b3be2a883b4bc440df3dbb1865 (git)
Affected: d4ec4bdc0bd5ad352854473ba4dcbdb39fd5bfdd , < 7356d8e367d0e025a568e369c4cf575722cac60f (git)
Affected: d4ec4bdc0bd5ad352854473ba4dcbdb39fd5bfdd , < c65564790048fa416ccd26a8945c7ec0cf9ef0b7 (git)
Affected: d4ec4bdc0bd5ad352854473ba4dcbdb39fd5bfdd , < 75818afff631e1ea785a82c3e8bb82eb0dee539c (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.2",
                      "versionStartIncluding": "5.14",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2",
                      "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/amdkfd: Fix memory leakage\n\nThis patch fixes potential memory leakage and seg fault\nin  _gpuvm_import_dmabuf() function"
            }
          ],
          "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 only through the local AMDKFD_IOC_IMPORT_DMABUF ioctl on /dev/kfd (kfd_ioctl \u2192 kfd_ioctl_import_dmabuf \u2192 amdgpu_amdkfd_gpuvm_import_dmabuf), not via network or adjacent-link protocols.\nAC:L - A local attacker who can open /dev/kfd can prepare a valid amdgpu dmabuf, call import, and induce memory pressure so the post-kzalloc drm_vma_node_allow kmalloc fails; that OOM condition is attacker-influenced, not a victim-only race or layout.\nPR:L - /dev/kfd is udev MODE 0660 GROUP render with seat uaccess, and IMPORT_DMABUF has no capability flag; any unprivileged render/seat user can open the device and issue the ioctl.\nUI:N - The attacker opens /dev/kfd, acquires a VM, and issues IMPORT_DMABUF themselves; no separate victim action is required.\nS:U - Impact is host-kernel memory corruption/DoS within the same OS security authority; the path does not cross a VM, IOMMU, or other boundary.\nC:H - kfree(mem) frees a stack address, so free_large_kmalloc/__free_pages releases the wrong page (or a miscomputed page under VMAP_STACK), enabling allocator/page reuse and kernel memory disclosure primitives.\nI:H - The same invalid free returns a live kernel page to the allocator while it may still be in use, yielding memory corruption and write/control-flow hijack primitives beyond a pure crash.\nA:H - The fix commit documents a segfault on this path, and freeing the wrong page predictably causes kernel oops/panic or hang, which is Availability High."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:59:04.060Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/8876793e56ec69b3be2a883b4bc440df3dbb1865"
            },
            {
              "url": "https://git.kernel.org/stable/c/7356d8e367d0e025a568e369c4cf575722cac60f"
            },
            {
              "url": "https://git.kernel.org/stable/c/c65564790048fa416ccd26a8945c7ec0cf9ef0b7"
            },
            {
              "url": "https://git.kernel.org/stable/c/75818afff631e1ea785a82c3e8bb82eb0dee539c"
            }
          ],
          "title": "drm/amdkfd: Fix memory leakage",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-50528",
        "datePublished": "2025-10-07T15:19:19.909Z",
        "dateReserved": "2025-10-07T15:15:38.664Z",
        "dateUpdated": "2026-10-15T21:41:21.858Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Vulnerability timeline

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