CVE-2021-47248 (GCVE-0-2021-47248)
Vulnerability from cvelistv5
Published
2024-05-21 14:19
Modified
2025-05-04 07:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: udp: fix race between close() and udp_abort() Kaustubh reported and diagnosed a panic in udp_lib_lookup(). The root cause is udp_abort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}_destroy_sock() release it before performing destructive actions. We can't easily extend the socket lock scope to avoid the race, instead use the SOCK_DEAD flag to prevent udp_abort from doing any action when the critical race happens. Diagnosed-and-tested-by: Kaustubh Pandey <kapandey@codeaurora.org>
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241 Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241 Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
Version: 5d77dca82839ef016a93ad7acd7058b14d967752
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:07.937Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47248\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-23T18:04:43.420239Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T18:04:47.404Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"udp: fix race between close() and udp_abort()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"e3c36c773aed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"a0882f68f54f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"2f73448041bd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"5a88477c1c85\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"8729ec8a2238\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"65310b0aff86\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5d77dca82839\", \"lessThan\": \"a8b897c7bcd4\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/udp.c\", \"net/ipv6/udp.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.274\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.238\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.196\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.128\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.46\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/udp.c\", \"net/ipv6/udp.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f\"}, {\"url\": \"https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e\"}, {\"url\": \"https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad\"}, {\"url\": \"https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56\"}, {\"url\": \"https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac\"}, {\"url\": \"https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241\"}, {\"url\": \"https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nudp: fix race between close() and udp_abort()\\n\\nKaustubh reported and diagnosed a panic in udp_lib_lookup().\\nThe root cause is udp_abort() racing with close(). Both\\nracing functions acquire the socket lock, but udp{v6}_destroy_sock()\\nrelease it before performing destructive actions.\\n\\nWe can\u0027t easily extend the socket lock scope to avoid the race,\\ninstead use the SOCK_DEAD flag to prevent udp_abort from doing\\nany action when the critical race happens.\\n\\nDiagnosed-and-tested-by: Kaustubh Pandey \u003ckapandey@codeaurora.org\u003e\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:02:15.957Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47248\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T12:02:15.957Z\", \"dateReserved\": \"2024-04-10T18:59:19.536Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T14:19:45.588Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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