CVE-2021-47447 (GCVE-0-2021-47447)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:19 – Updated: 2026-08-05 08:47
VLAI
Title
drm/msm/a3xx: fix error handling in a3xx_gpu_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm/a3xx: fix error handling in a3xx_gpu_init() These error paths returned 1 on failure, instead of a negative error code. This would lead to an Oops in the caller. A second problem is that the check for "if (ret != -ENODATA)" did not work because "ret" was set to 1.
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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-22 15:54 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5785dd7a8ef0de8049f40a1a109de6a1bf17b479 , < d59e44e7821a8f2bb6f2e846b9167397a5f01608 (git)
Affected: 5785dd7a8ef0de8049f40a1a109de6a1bf17b479 , < 3eda901995371d390ef82d0b6462f4ea8efbcfdf (git)
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Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.14.14 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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                  "lang": "en",
                  "value": "AV:L - The bug is in the MSM Adreno a3xx GPU bind/init path (adreno_bind\u2192a3xx_gpu_init) and is later exercised via local DRM open (msm_open\u2192adreno_load_gpu) or local PM/unbind callbacks on Qualcomm a3xx devices, not via network or adjacent-link protocols.\nAC:L - On affected configurations where of_icc_get fails (including the explicitly optional ocmem -ENODATA case), the wrong IS_ERR\u2192ERR_PTR(1) path is deterministic: bind incorrectly succeeds after destroying the GPU, and a subsequent DRM open reliably hits the dangling drvdata with no attacker-uncontrollable race.\nPR:L - Triggering the use path only requires opening the local DRM device (/dev/dri/renderD* or card node), which is available to an ordinary unprivileged user or Android app in the video/render group; per guidance, choose PR:L over PR:H.\nUI:N - The attacker opens the DRM device (or otherwise exercises the GPU path) themselves; no separate victim interaction is required.\nS:U - Impact is confined to the host kernel (oops or local privilege-escalation class memory unsafety) and does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - a3xx_destroy frees the msm_gpu while platform drvdata still points at it (msm_gpu_cleanup did not clear drvdata in the vulnerable window), yielding a UAF; reclaiming that object enables arbitrary kernel read primitives, so Confidentiality is High.\nI:H - The UAF\u0027d msm_gpu contains function pointers (gpu-\u003efuncs) used by adreno_load_gpu/msm_gpu_hw_init and related paths; heap spraying the freed object provides a control-flow hijack / arbitrary write primitive, so Integrity is High.\nA:H - Using the dangling GPU pointer causes a kernel oops/panic (as described in the fix), which is a full availability impact under CVSS kernel guidance."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:47:50.874Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/d59e44e7821a8f2bb6f2e846b9167397a5f01608"
            },
            {
              "url": "https://git.kernel.org/stable/c/3eda901995371d390ef82d0b6462f4ea8efbcfdf"
            }
          ],
          "title": "drm/msm/a3xx: fix error handling in a3xx_gpu_init()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47447",
        "datePublished": "2024-05-22T06:19:39.506Z",
        "dateReserved": "2024-05-21T14:58:30.832Z",
        "dateUpdated": "2026-08-05T08:47:50.874Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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