{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47186", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.113Z", "datePublished": "2024-04-10T18:56:26.297Z", "dateUpdated": "2026-05-11T13:49:38.587Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:49:38.587Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: check for null after calling kmemdup\n\nkmemdup can return a null pointer so need to check for it, otherwise\nthe null key will be dereferenced later in tipc_crypto_key_xmit as\ncan be seen in the trace [1].\n\n\n[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/tipc/crypto.c"], "versions": [{"version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "a7d91625863d4ffed63b993b5e6dc1298b6430c9", "status": "affected", "versionType": "git"}, {"version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "9404c4145542c23019a80ab1bb2ecf73cd057b10", "status": "affected", "versionType": "git"}, {"version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "3e6db079751afd527bf3db32314ae938dc571916", "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/tipc/crypto.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.82", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "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": "5.10", "versionEndExcluding": "5.10.82"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9"}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10"}, {"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916"}], "title": "tipc: check for null after calling kmemdup", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"affected": [{"vendor": "linux", "product": "linux_kernel", "cpes": ["cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "versions": [{"version": "1da177e4c3f4", "status": "affected", "lessThan": "a7d91625863d", "versionType": "custom"}, {"version": "1da177e4c3f4", "status": "affected", "lessThan": "9404c4145542", "versionType": "custom"}, {"version": "1da177e4c3f4", "status": "affected", "lessThan": "3e6db079751a", "versionType": "custom"}, {"version": "5.10.82", "status": "unaffected", "lessThanOrEqual": "5.11", "versionType": "custom"}, {"version": "5.15.5", "status": "unaffected", "lessThanOrEqual": "5.16", "versionType": "custom"}, {"version": "5.16", "status": "unaffected"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-04-15T14:53:12.521984Z", "id": "CVE-2021-47186", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-21T17:04:55.843Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.381Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.381Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47186", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-15T14:53:12.521984Z"}}}], "affected": [{"cpes": ["cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*"], "vendor": "linux", "product": "linux_kernel", "versions": [{"status": "affected", "version": "1da177e4c3f4", "lessThan": "a7d91625863d", "versionType": "custom"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "9404c4145542", "versionType": "custom"}, {"status": "affected", "version": "1da177e4c3f4", "lessThan": "3e6db079751a", "versionType": "custom"}, {"status": "unaffected", "version": "5.10.82", "versionType": "custom", "lessThanOrEqual": "5.11"}, {"status": "unaffected", "version": "5.15.5", "versionType": "custom", "lessThanOrEqual": "5.16"}, {"status": "unaffected", "version": "5.16"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-03T17:54:34.222Z"}}], "cna": {"title": "tipc: check for null after calling kmemdup", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "a7d91625863d4ffed63b993b5e6dc1298b6430c9", "versionType": "git"}, {"status": "affected", "version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "9404c4145542c23019a80ab1bb2ecf73cd057b10", "versionType": "git"}, {"status": "affected", "version": "1ef6f7c9390ff5308c940ff8d0a53533a4673ad9", "lessThan": "3e6db079751afd527bf3db32314ae938dc571916", "versionType": "git"}], "programFiles": ["net/tipc/crypto.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"status": "unaffected", "version": "0", "lessThan": "5.10", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.82", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.5", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/tipc/crypto.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9"}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10"}, {"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: check for null after calling kmemdup\n\nkmemdup can return a null pointer so need to check for it, otherwise\nthe null key will be dereferenced later in tipc_crypto_key_xmit as\ncan be seen in the trace [1].\n\n\n[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.82", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.5", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.16", "versionStartIncluding": "5.10"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-20T14:27:26.664Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47186", "state": "PUBLISHED", "dateUpdated": "2025-05-20T14:27:26.664Z", "dateReserved": "2024-03-25T09:12:14.113Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-10T18:56:26.297Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: check for null after calling kmemdup\n\nkmemdup can return a null pointer so need to check for it, otherwise\nthe null key will be dereferenced later in tipc_crypto_key_xmit as\ncan be seen in the trace [1].\n\n\n[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tipc: verifique si hay valores nulos despu\u00e9s de llamar a kmemdup kmemdup puede devolver un puntero nulo, por lo que es necesario verificarlo; de lo contrario, se eliminar\u00e1 la referencia a la clave nula m\u00e1s adelante en tipc_crypto_key_xmit, como se puede ver en el seguimiento. [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58"}], "id": "CVE-2021-47186", "lastModified": "2025-02-21T17:15:10.273", "metrics": {}, "published": "2024-04-10T19:15:47.430", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: tipc: check for null after calling kmemdup", "id": "2274623", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2274623"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-690", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntipc: check for null after calling kmemdup\nkmemdup can return a null pointer so need to check for it, otherwise\nthe null key will be dereferenced later in tipc_crypto_key_xmit as\ncan be seen in the trace [1].\n[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58"], "name": "CVE-2021-47186", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2024-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47186\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47186\nhttps://lore.kernel.org/linux-cve-announce/2024041033-CVE-2021-47186-7287@gregkh/T"], "threat_severity": "Low"}

{}