{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47461","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.197Z","datePublished":"2024-05-22T06:23:22.373Z","dateUpdated":"2025-05-04T07:11:24.932Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:11:24.932Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nuserfaultfd: fix a race between writeprotect and exit_mmap()\n\nA race is possible when a process exits, its VMAs are removed by\nexit_mmap() and at the same time userfaultfd_writeprotect() is called.\n\nThe race was detected by KASAN on a development kernel, but it appears\nto be possible on vanilla kernels as well.\n\nUse mmget_not_zero() to prevent the race as done in other userfaultfd\noperations."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/userfaultfd.c"],"versions":[{"version":"63b2d4174c4ad1f40b48d7138e71bcb564c1fe03","lessThan":"3cda4bfffd4f755645577aaa9e96a606657b4525","status":"affected","versionType":"git"},{"version":"63b2d4174c4ad1f40b48d7138e71bcb564c1fe03","lessThan":"149958ecd0627a9f1e9c678c25c665400054cd6a","status":"affected","versionType":"git"},{"version":"63b2d4174c4ad1f40b48d7138e71bcb564c1fe03","lessThan":"cb185d5f1ebf900f4ae3bf84cee212e6dd035aca","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/userfaultfd.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.76","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.15","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","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":"5.7","versionEndExcluding":"5.10.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.14.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525"},{"url":"https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a"},{"url":"https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca"}],"title":"userfaultfd: fix a race between writeprotect and exit_mmap()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47461","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-22T18:15:05.306200Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:15:25.867Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.468Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca","tags":["x_transferred"]}]}]}}