{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-46971","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-27T18:42:55.943Z","datePublished":"2024-02-27T18:47:06.674Z","dateUpdated":"2025-05-04T07:01:25.834Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:01:25.834Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix unconditional security_locked_down() call\n\nCurrently, the lockdown state is queried unconditionally, even though\nits result is used only if the PERF_SAMPLE_REGS_INTR bit is set in\nattr.sample_type. While that doesn't matter in case of the Lockdown LSM,\nit causes trouble with the SELinux's lockdown hook implementation.\n\nSELinux implements the locked_down hook with a check whether the current\ntask's type has the corresponding \"lockdown\" class permission\n(\"integrity\" or \"confidentiality\") allowed in the policy. This means\nthat calling the hook when the access control decision would be ignored\ngenerates a bogus permission check and audit record.\n\nFix this by checking sample_type first and only calling the hook when\nits result would be honored."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"],"versions":[{"version":"b0c8fdc7fdb77586c3d1937050925b960743306e","lessThan":"b246759284d6a2bc5b6f1009caeeb3abce2ec9ff","status":"affected","versionType":"git"},{"version":"b0c8fdc7fdb77586c3d1937050925b960743306e","lessThan":"4348d3b5027bc3ff6336368b6c60605d4ef8e1ce","status":"affected","versionType":"git"},{"version":"b0c8fdc7fdb77586c3d1937050925b960743306e","lessThan":"f5809ca4c311b71bfaba6d13f4e39eab0557895e","status":"affected","versionType":"git"},{"version":"b0c8fdc7fdb77586c3d1937050925b960743306e","lessThan":"c7b0208ee370b89d20486fae71cd9abb759819c1","status":"affected","versionType":"git"},{"version":"b0c8fdc7fdb77586c3d1937050925b960743306e","lessThan":"08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"],"versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"5.4.117","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.35","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.11.19","lessThanOrEqual":"5.11.*","status":"unaffected","versionType":"semver"},{"version":"5.12.2","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":"5.4","versionEndExcluding":"5.4.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.10.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.11.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.12.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/b246759284d6a2bc5b6f1009caeeb3abce2ec9ff"},{"url":"https://git.kernel.org/stable/c/4348d3b5027bc3ff6336368b6c60605d4ef8e1ce"},{"url":"https://git.kernel.org/stable/c/f5809ca4c311b71bfaba6d13f4e39eab0557895e"},{"url":"https://git.kernel.org/stable/c/c7b0208ee370b89d20486fae71cd9abb759819c1"},{"url":"https://git.kernel.org/stable/c/08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b"}],"title":"perf/core: Fix unconditional security_locked_down() call","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-46971","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-28T20:22:11.491385Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:13:04.676Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:17:42.943Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/b246759284d6a2bc5b6f1009caeeb3abce2ec9ff","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4348d3b5027bc3ff6336368b6c60605d4ef8e1ce","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f5809ca4c311b71bfaba6d13f4e39eab0557895e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c7b0208ee370b89d20486fae71cd9abb759819c1","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b","tags":["x_transferred"]}]}]}}