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CVE-2021-47523 (GCVE-0-2021-47523)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56
VLAI
Title
IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr
Summary
In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr This buffer is currently allocated in hfi1_init(): if (reinit) ret = init_after_reset(dd); else ret = loadtime_init(dd); if (ret) goto done; /* allocate dummy tail memory for all receive contexts */ dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev, sizeof(u64), &dd->rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd->rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, "cannot allocate dummy tail memory\n"); ret = -ENOMEM; goto done; } The reinit triggered path will overwrite the old allocation and leak it. Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation to hfi1_free_devdata().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-24 19:17 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 2c08271f4ed0e24633b3f81ceff61052b9d45efc (git)
Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 834d0fb978643eaf09da425de197cc16a7c2761b (git)
Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1 (git)
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Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 5.10.85 , ≤ 5.10.* (semver)
Unaffected: 5.15.8 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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      "id": "CVE-2021-47523",
      "lastModified": "2024-11-21T06:36:26.670",
      "published": "2024-05-24T15:15:14.743",
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      "initial_release_date": "2021-01-01T00:00:00+00:00",
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      "title": "kernel: IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr",
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      "initial_release_date": "2024-05-28T15:29:45Z",
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      "product_status:known_not_affected": "61",
      "product_status:recommended": "627",
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      "status": "interim",
      "title": "SUSE CVE CVE-2021-47523",
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      "version": "60"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.792Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47523\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-24T19:17:45.550563Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-24T19:17:51.484Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"46b010d3eeb8eb29c740c4ef09c666485f5c07e6\", \"lessThan\": \"2c08271f4ed0e24633b3f81ceff61052b9d45efc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46b010d3eeb8eb29c740c4ef09c666485f5c07e6\", \"lessThan\": \"834d0fb978643eaf09da425de197cc16a7c2761b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"46b010d3eeb8eb29c740c4ef09c666485f5c07e6\", \"lessThan\": \"60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/infiniband/hw/hfi1/init.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/infiniband/hw/hfi1/init.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efc\"}, {\"url\": \"https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761b\"}, {\"url\": \"https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nIB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr\\n\\nThis buffer is currently allocated in hfi1_init():\\n\\n\\tif (reinit)\\n\\t\\tret = init_after_reset(dd);\\n\\telse\\n\\t\\tret = loadtime_init(dd);\\n\\tif (ret)\\n\\t\\tgoto done;\\n\\n\\t/* allocate dummy tail memory for all receive contexts */\\n\\tdd-\u003ercvhdrtail_dummy_kvaddr = dma_alloc_coherent(\u0026dd-\u003epcidev-\u003edev,\\n\\t\\t\\t\\t\\t\\t\\t sizeof(u64),\\n\\t\\t\\t\\t\\t\\t\\t \u0026dd-\u003ercvhdrtail_dummy_dma,\\n\\t\\t\\t\\t\\t\\t\\t GFP_KERNEL);\\n\\n\\tif (!dd-\u003ercvhdrtail_dummy_kvaddr) {\\n\\t\\tdd_dev_err(dd, \\\"cannot allocate dummy tail memory\\\\n\\\");\\n\\t\\tret = -ENOMEM;\\n\\t\\tgoto done;\\n\\t}\\n\\nThe reinit triggered path will overwrite the old allocation and leak it.\\n\\nFix by moving the allocation to hfi1_alloc_devdata() and the deallocation\\nto hfi1_free_devdata().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.85\", \"versionStartIncluding\": \"4.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.8\", \"versionStartIncluding\": \"4.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"4.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:12:48.778Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47523\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:12:48.778Z\", \"dateReserved\": \"2024-05-24T15:02:54.825Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:09:36.045Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.