CVE-2021-47042 (GCVE-0-2021-47042)

Vulnerability from cvelistv5 – Published: 2024-02-28 08:13 – Updated: 2026-05-11 13:46
VLAI?
Title
drm/amd/display: Free local data after use
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Free local data after use Fixes the following memory leak in dc_link_construct(): unreferenced object 0xffffa03e81471400 (size 1024): comm "amd_module_load", pid 2486, jiffies 4294946026 (age 10.544s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000000bdf5c4a>] kmem_cache_alloc_trace+0x30a/0x4a0 [<00000000e7c59f0e>] link_create+0xce/0xac0 [amdgpu] [<000000002fb6c072>] dc_create+0x370/0x720 [amdgpu] [<000000000094d1f3>] amdgpu_dm_init+0x18e/0x17a0 [amdgpu] [<00000000bec048fd>] dm_hw_init+0x12/0x20 [amdgpu] [<00000000a2bb7cf6>] amdgpu_device_init+0x1463/0x1e60 [amdgpu] [<0000000032d3bb13>] amdgpu_driver_load_kms+0x5b/0x330 [amdgpu] [<00000000a27834f9>] amdgpu_pci_probe+0x192/0x280 [amdgpu] [<00000000fec7d291>] local_pci_probe+0x47/0xa0 [<0000000055dbbfa7>] pci_device_probe+0xe3/0x180 [<00000000815da970>] really_probe+0x1c4/0x4e0 [<00000000b4b6974b>] driver_probe_device+0x62/0x150 [<000000000f9ecc61>] device_driver_attach+0x58/0x60 [<000000000f65c843>] __driver_attach+0xd6/0x150 [<000000002f5e3683>] bus_for_each_dev+0x6a/0xc0 [<00000000a1cfc897>] driver_attach+0x1e/0x20
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3a00c04212d1cfe1426338b78f4ead623508c874 , < 296443139f893b554dddd56a99ba8471ab5802d4 (git)
Affected: 3a00c04212d1cfe1426338b78f4ead623508c874 , < 616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1 (git)
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Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.12.4 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "id": "CVE-2021-47042",
      "lastModified": "2024-12-06T18:41:24.943",
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Corrige la siguiente p\u00e9rdida de memoria en dc_link_construct(): objeto sin referencia 0xffffa03e81471400 (tama\u00f1o 1024): comm \\\"amd_module_load\\\", pid 2486, jiffies 4294946026 (edad 10,544 s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ retroceso: [\u0026lt;000000000bdf5c4a\u0026gt;] kmem_cache_alloc_trace+0x30a/0x4a0 [\u0026lt;00000000e7c59f0e\u0026gt;] link_create+0xce/0xac0 [amdgpu] [\u0026lt;000000002fb6c072\u0026gt;] dc_create+0x370/0x720 [amdgpu] [\u0026lt;000000000094d1f3\u0026gt;] amdgpu_dm_init+0x18e/0x17a0 [amdgpu] [\u0026lt;00000000bec048fd\u0026gt;] dm_hw_in es+0x12/0x20 [amdgpu] [\u0026lt;00000000a2bb7cf6\u0026gt;] amdgpu_device_init+0x1463 /0x1e60 [amdgpu] [\u0026lt;0000000032d3bb13\u0026gt;] amdgpu_driver_load_kms+0x5b/0x330 [amdgpu] [\u0026lt;00000000a27834f9\u0026gt;] amdgpu_pci_probe+0x192/0x280 [amdgpu] [\u0026lt;00000000fec7d29 1\u0026gt;] local_pci_probe+0x47/0xa0 [\u0026lt;0000000055dbbfa7\u0026gt;] pci_device_probe+0xe3/ 0x180 [\u0026lt;00000000815da970\u0026gt;] very_probe+0x1c4/0x4e0 [\u0026lt;00000000b4b6974b\u0026gt;] driver_probe_device+0x62/0x150 [\u0026lt;000000000f9ecc61\u0026gt;] device_driver_attach+0x58/0x60 [\u0026lt;0000000 00f65c843\u0026gt;] __driver_attach+0xd6/0x150 [\u0026lt;000000002f5e3683\u0026gt;] bus_for_each_dev+0x6a/ 0xc0 [\u0026lt;00000000a1cfc897\u0026gt;] controlador_attach+0x1e/0x20\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.12.4\",\"matchCriteriaId\":\"D8C7052F-1B7B-4327-9C2B-84EBF3243838\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/296443139f893b554dddd56a99ba8471ab5802d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/296443139f893b554dddd56a99ba8471ab5802d4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/296443139f893b554dddd56a99ba8471ab5802d4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:39.499Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47042\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:57:44.782253Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:12.701Z\"}}], \"cna\": {\"title\": \"drm/amd/display: Free local data after use\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3a00c04212d1cfe1426338b78f4ead623508c874\", \"lessThan\": \"296443139f893b554dddd56a99ba8471ab5802d4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3a00c04212d1cfe1426338b78f4ead623508c874\", \"lessThan\": \"616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/display/dc/core/dc_link.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.12.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/display/dc/core/dc_link.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/296443139f893b554dddd56a99ba8471ab5802d4\"}, {\"url\": \"https://git.kernel.org/stable/c/616cf23b6cf40ad6f03ffbddfa1b6c4eb68d8ae1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/display: Free local data after use\\n\\nFixes the following memory leak in dc_link_construct():\\n\\nunreferenced object 0xffffa03e81471400 (size 1024):\\ncomm \\\"amd_module_load\\\", pid 2486, jiffies 4294946026 (age 10.544s)\\nhex dump (first 32 bytes):\\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\\nbacktrace:\\n[\u003c000000000bdf5c4a\u003e] kmem_cache_alloc_trace+0x30a/0x4a0\\n[\u003c00000000e7c59f0e\u003e] link_create+0xce/0xac0 [amdgpu]\\n[\u003c000000002fb6c072\u003e] dc_create+0x370/0x720 [amdgpu]\\n[\u003c000000000094d1f3\u003e] amdgpu_dm_init+0x18e/0x17a0 [amdgpu]\\n[\u003c00000000bec048fd\u003e] dm_hw_init+0x12/0x20 [amdgpu]\\n[\u003c00000000a2bb7cf6\u003e] amdgpu_device_init+0x1463/0x1e60 [amdgpu]\\n[\u003c0000000032d3bb13\u003e] amdgpu_driver_load_kms+0x5b/0x330 [amdgpu]\\n[\u003c00000000a27834f9\u003e] amdgpu_pci_probe+0x192/0x280 [amdgpu]\\n[\u003c00000000fec7d291\u003e] local_pci_probe+0x47/0xa0\\n[\u003c0000000055dbbfa7\u003e] pci_device_probe+0xe3/0x180\\n[\u003c00000000815da970\u003e] really_probe+0x1c4/0x4e0\\n[\u003c00000000b4b6974b\u003e] driver_probe_device+0x62/0x150\\n[\u003c000000000f9ecc61\u003e] device_driver_attach+0x58/0x60\\n[\u003c000000000f65c843\u003e] __driver_attach+0xd6/0x150\\n[\u003c000000002f5e3683\u003e] bus_for_each_dev+0x6a/0xc0\\n[\u003c00000000a1cfc897\u003e] driver_attach+0x1e/0x20\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.4\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T13:46:50.069Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47042\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T13:46:50.069Z\", \"dateReserved\": \"2024-02-27T18:42:55.969Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:47.809Z\", \"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.