{"id":"CVE-2021-47186","state":"PUBLISHED","title":"tipc: check for null after calling kmemdup","description":"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","publishedAt":"2024-04-10T18:56:26.297Z","updatedAt":"2026-05-11T13:49:38.587Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1ef6f7c9390ff5308c940ff8d0a53533a4673ad9","status":"affected","lessThan":"a7d91625863d4ffed63b993b5e6dc1298b6430c9","versionType":"git"},{"version":"1ef6f7c9390ff5308c940ff8d0a53533a4673ad9","status":"affected","lessThan":"9404c4145542c23019a80ab1bb2ecf73cd057b10","versionType":"git"},{"version":"1ef6f7c9390ff5308c940ff8d0a53533a4673ad9","status":"affected","lessThan":"3e6db079751afd527bf3db32314ae938dc571916","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/crypto.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.82","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.5","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/tipc/crypto.c"]}],"references":["https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9","https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10","https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47186.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47186","state":"PUBLISHED","datePublished":"2024-04-10T18:56:26.297Z","dateUpdated":"2026-05-11T13:49:38.587Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-25T09:12:14.113Z"},"containers":{"cna":{"title":"tipc: check for null after calling kmemdup","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] 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