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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 CPE status
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)
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d59e44e7821a8f2bb6f2e846b9167397a5f01608\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3eda901995371d390ef82d0b6462f4ea8efbcfdf\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.478Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47447\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-22T15:54:08.510506Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:25.578Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"drm/msm/a3xx: fix error handling in a3xx_gpu_init()\", \"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 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.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5785dd7a8ef0de8049f40a1a109de6a1bf17b479\", \"lessThan\": \"d59e44e7821a8f2bb6f2e846b9167397a5f01608\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5785dd7a8ef0de8049f40a1a109de6a1bf17b479\", \"lessThan\": \"3eda901995371d390ef82d0b6462f4ea8efbcfdf\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/msm/adreno/a3xx_gpu.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.11\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.11\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.14.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/msm/adreno/a3xx_gpu.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d59e44e7821a8f2bb6f2e846b9167397a5f01608\"}, {\"url\": \"https://git.kernel.org/stable/c/3eda901995371d390ef82d0b6462f4ea8efbcfdf\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/msm/a3xx: fix error handling in a3xx_gpu_init()\\n\\nThese error paths returned 1 on failure, instead of a negative error\\ncode.  This would lead to an Oops in the caller.  A second problem is\\nthat the check for \\\"if (ret != -ENODATA)\\\" did not work because \\\"ret\\\" was\\nset to 1.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.14\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"5.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:47:50.874Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47447\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:47:50.874Z\", \"dateReserved\": \"2024-05-21T14:58:30.832Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T06:19:39.506Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.