CVE-2021-46966 (GCVE-0-2021-46966)
Vulnerability from cvelistv5
Published
2024-02-27 18:47
Modified
2025-05-04 12:40
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b Patch
Impacted products
Vendor Product Version
Linux Linux Version: 4bda2b79a9d04c8ba31681c66e95877dbb433416
Version: 5c12dadcbef8cd55ef1f5dac799bfcbb7ea7db1d
Version: 35b88a10535edcf62d3e6b7893a8cd506ff98a24
Version: e4467fb6ef547aa352dc03397f9474ec84eced5b
Version: 03d1571d9513369c17e6848476763ebbd10ec2cb
Version: 03d1571d9513369c17e6848476763ebbd10ec2cb
Version: 03d1571d9513369c17e6848476763ebbd10ec2cb
Version: 03d1571d9513369c17e6848476763ebbd10ec2cb
Version: 03d1571d9513369c17e6848476763ebbd10ec2cb
Version: 70424999fbf1f160ade111cb9baab51776e0f9c2
Version: 06cd4a06eb596a888239fb8ceb6ea15677cab396
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      "cveMetadata": "{\"cveId\": \"CVE-2021-46966\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T12:40:40.314Z\", \"dateReserved\": \"2024-02-27T18:42:55.943Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-27T18:47:03.631Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.


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