{"id":"CVE-2021-47190","state":"PUBLISHED","title":"perf bpf: Avoid memory leak from perf_env__insert_btf()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf bpf: Avoid memory leak from perf_env__insert_btf()\n\nperf_env__insert_btf() doesn't insert if a duplicate BTF id is\nencountered and this causes a memory leak. Modify the function to return\na success/error value and then free the memory if insertion didn't\nhappen.\n\nv2. Adds a return -1 when the insertion error occurs in\n    perf_env__fetch_btf. This doesn't affect anything as the result is\n    never checked.","publishedAt":"2024-04-10T18:56:28.815Z","updatedAt":"2026-05-11T13:49:43.257Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"642fc22210a5e59d40b1e4d56d21ec3effd401f2","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"11589d3144bc4e272e0aae46ce8156162e99babc","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"ab7c3d8d81c511ddfb27823fb07081c96422b56e","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"4924b1f7c46711762fd0e65c135ccfbcfd6ded1f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/perf/util/bpf-event.c","tools/perf/util/env.c","tools/perf/util/env.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.1","versionType":"semver"},{"version":"5.4.162","status":"unaffected","lessThanOrEqual":"5.4.*","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":["tools/perf/util/bpf-event.c","tools/perf/util/env.c","tools/perf/util/env.h"]}],"references":["https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2","https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc","https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e","https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47190.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47190","state":"PUBLISHED","datePublished":"2024-04-10T18:56:28.815Z","dateUpdated":"2026-05-11T13:49:43.257Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-25T09:12:14.113Z"},"containers":{"cna":{"title":"perf bpf: Avoid memory leak from perf_env__insert_btf()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf bpf: Avoid memory leak from perf_env__insert_btf()\n\nperf_env__insert_btf() doesn't insert if a duplicate BTF id is\nencountered and this causes a memory leak. Modify the function to return\na success/error value and then free the memory if insertion didn't\nhappen.\n\nv2. Adds a return -1 when the insertion error occurs in\n    perf_env__fetch_btf. This doesn't affect anything as the result is\n    never checked."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"642fc22210a5e59d40b1e4d56d21ec3effd401f2","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"11589d3144bc4e272e0aae46ce8156162e99babc","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"ab7c3d8d81c511ddfb27823fb07081c96422b56e","versionType":"git"},{"version":"3792cb2ff43b1b193136a03ce1336462a827d792","status":"affected","lessThan":"4924b1f7c46711762fd0e65c135ccfbcfd6ded1f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/perf/util/bpf-event.c","tools/perf/util/env.c","tools/perf/util/env.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.1","versionType":"semver"},{"version":"5.4.162","status":"unaffected","lessThanOrEqual":"5.4.*","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":["tools/perf/util/bpf-event.c","tools/perf/util/env.c","tools/perf/util/env.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2"},{"url":"https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc"},{"url":"https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e"},{"url":"https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:49:43.257Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"5.4.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"5.10.82"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"5.15.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"5.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babc","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1f","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:32:07.210Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47190","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:50:08.099272Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:33:38.595Z"}}]}}}