CVE-2021-47186

{"id": "CVE-2021-47186", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47186", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2024-04-15T14:53:12.521984Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"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"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "affectedData": [{"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"}]}], "published": "2024-04-10T19:15:47.430", "references": [{"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "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"}], "lastModified": "2026-06-17T04:16:51.793", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE501832-500C-4EF1-9489-5C13674F619D", "versionEndExcluding": "5.10.82", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2128A085-4C0C-4C1E-9E9C-0DD868E2170F", "versionEndExcluding": "5.15.5", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}