{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47248", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-04-10T18:59:19.536Z", "datePublished": "2024-05-21T14:19:45.588Z", "dateUpdated": "2025-05-04T07:07:06.760Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:07:06.760Z"}, "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't 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 <kapandey@codeaurora.org>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp.c", "net/ipv6/udp.c"], "versions": [{"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "e3c36c773aed0fef8b1d3d555b43393ec564400f", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "a0882f68f54f7a8b6308261acee9bd4faab5a69e", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "2f73448041bd0682d4b552cfd314ace66107f1ad", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "5a88477c1c85e4baa51e91f2d40f2166235daa56", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "8729ec8a2238152a4afc212a331a6cd2c61aeeac", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "65310b0aff86980a011c7c7bfa487a333d4ca241", "status": "affected", "versionType": "git"}, {"version": "5d77dca82839ef016a93ad7acd7058b14d967752", "lessThan": "a8b897c7bcd47f4147d066e22cc01d1026d7640e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp.c", "net/ipv6/udp.c"], "versions": [{"version": "4.9", "status": "affected"}, {"version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.274", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.238", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.196", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.128", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.46", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.13", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "4.9.274"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "4.14.238"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "4.19.196"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.4.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.10.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.12.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.13"}]}]}], "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"}], "title": "udp: fix race between close() and udp_abort()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "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": "2024-06-04T17:13:24.395Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.937Z"}, "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"]}]}]}}

{"dataType": "CVE_RECORD", "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't 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 <kapandey@codeaurora.org>"}], "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"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B5A1555-2CC4-4652-AD96-3529D26B3447", "versionEndExcluding": "4.9.274", "versionStartIncluding": "4.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C3C0DBBF-0923-4D2A-9178-134691F9933F", "versionEndExcluding": "4.14.238", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F3CAB837-7D38-4934-AD4F-195CEFD754E6", "versionEndExcluding": "4.19.196", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6267BD4E-BE25-48B5-B850-4B493440DAFA", "versionEndExcluding": "5.4.128", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "59455D13-A902-42E1-97F7-5ED579777193", "versionEndExcluding": "5.10.46", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7806E7E5-6D4F-4E18-81C1-79B3C60EE855", "versionEndExcluding": "5.12.13", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*", "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*", "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:*", "matchCriteriaId": "1ECD33F5-85BE-430B-8F86-8D7BD560311D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:*", "matchCriteriaId": "CF351855-2437-4CF5-AD7C-BDFA51F27683", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:*", "matchCriteriaId": "25A855BA-2118-44F2-90EF-EBBB12AF51EF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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't 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 <kapandey@codeaurora.org>"}, {"lang": "es", "value": " En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: udp: corrige la ejecuci\u00f3n entre close() y udp_abort(). Kaustubh inform\u00f3 y diagnostic\u00f3 un p\u00e1nico en udp_lib_lookup(). La causa principal es que udp_abort() compite con close(). Ambas funciones de ejecuci\u00f3n adquieren el bloqueo del socket, pero udp{v6}_destroy_sock() lo libera antes de realizar acciones destructivas. No podemos extender f\u00e1cilmente el alcance del bloqueo del socket para evitar la ejecuci\u00f3n; en su lugar, usamos el indicador SOCK_DEAD para evitar que udp_abort realice alguna acci\u00f3n cuando ocurre la ejecuci\u00f3n cr\u00edtica. Diagnosticado y probado por: Kaustubh Pandey "}], "id": "CVE-2021-47248", "lastModified": "2025-04-30T15:21:04.770", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-05-21T15:15:13.780", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2f73448041bd0682d4b552cfd314ace66107f1ad"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a88477c1c85e4baa51e91f2d40f2166235daa56"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65310b0aff86980a011c7c7bfa487a333d4ca241"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8729ec8a2238152a4afc212a331a6cd2c61aeeac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a0882f68f54f7a8b6308261acee9bd4faab5a69e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8b897c7bcd47f4147d066e22cc01d1026d7640e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e3c36c773aed0fef8b1d3d555b43393ec564400f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: udp: fix race between close() and udp_abort()", "id": "2282564", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282564"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nudp: fix race between close() and udp_abort()\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.\nWe can't 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.\nDiagnosed-and-tested-by: Kaustubh Pandey <kapandey@codeaurora.org>", "A vulnerability was found in the Linux kernel's UDP implementation, where a race condition exists between the close() and udp_abort() functions. This race can cause a system panic during socket operations, leading to unexpected crashes"], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2021-47248", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47248\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47248\nhttps://lore.kernel.org/linux-cve-announce/2024052143-CVE-2021-47248-2609@gregkh/T"], "statement": "This vulnerability is rated as a moderate severity because this issue results in system crashes under specific conditions and exploitation requires precise timing.", "threat_severity": "Moderate"}