CVE-2021-47295 (GCVE-0-2021-47295)
Vulnerability from cvelistv5
Published
2024-05-21 14:35
Modified
2025-05-04 07:08
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sched: fix memory leak in tcindex_partial_destroy_work Syzbot reported memory leak in tcindex_set_parms(). The problem was in non-freed perfect hash in tcindex_partial_destroy_work(). In tcindex_set_parms() new tcindex_data is allocated and some fields from old one are copied to new one, but not the perfect hash. Since tcindex_partial_destroy_work() is the destroy function for old tcindex_data, we need to free perfect hash to avoid memory leak.
References
Impacted products
Vendor Product Version
Linux Linux Version: 331b72922c5f58d48fd5500acadc91777cc31970
Version: 331b72922c5f58d48fd5500acadc91777cc31970
Version: 331b72922c5f58d48fd5500acadc91777cc31970
Version: 331b72922c5f58d48fd5500acadc91777cc31970
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\"versions\": [{\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.4.136\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.5\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.10.54\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.11\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.13.6\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"5.14\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.14\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400 Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-06T17:38:18.984Z\"}}], \"cna\": {\"title\": \"net: sched: fix memory leak in tcindex_partial_destroy_work\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"331b72922c5f\", \"lessThan\": \"8d7924ce85ba\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"331b72922c5f\", \"lessThan\": \"8e9662fde6d6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"331b72922c5f\", \"lessThan\": \"cac71d27745f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"331b72922c5f\", \"lessThan\": \"f5051bcece50\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/cls_tcindex.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.136\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.13.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/cls_tcindex.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8d7924ce85bae64e7a67c366c7c50840f49f3a62\"}, {\"url\": \"https://git.kernel.org/stable/c/8e9662fde6d63c78eb1350f6167f64c9d71a865b\"}, {\"url\": \"https://git.kernel.org/stable/c/cac71d27745f92ee13f0ecc668ffe151a4a9c9b1\"}, {\"url\": \"https://git.kernel.org/stable/c/f5051bcece50140abd1a11a2d36dc3ec5484fc32\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: sched: fix memory leak in tcindex_partial_destroy_work\\n\\nSyzbot reported memory leak in tcindex_set_parms(). The problem was in\\nnon-freed perfect hash in tcindex_partial_destroy_work().\\n\\nIn tcindex_set_parms() new tcindex_data is allocated and some fields from\\nold one are copied to new one, but not the perfect hash. Since\\ntcindex_partial_destroy_work() is the destroy function for old\\ntcindex_data, we need to free perfect hash to avoid memory leak.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:03:10.169Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47295\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T12:03:10.169Z\", \"dateReserved\": \"2024-05-21T13:27:52.130Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:35:18.696Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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