{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47006","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-27T18:42:55.952Z","datePublished":"2024-02-28T08:13:26.541Z","dateUpdated":"2026-05-11T13:46:08.152Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T13:46:08.152Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook\n\nThe commit 1879445dfa7b (\"perf/core: Set event's default\n::overflow_handler()\") set a default event->overflow_handler in\nperf_event_alloc(), and replace the check event->overflow_handler with\nis_default_overflow_handler(), but one is missing.\n\nCurrently, the bp->overflow_handler can not be NULL. As a result,\nenable_single_step() is always not invoked.\n\nComments from Zhen Lei:\n\n https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"],"versions":[{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"555a70f7fff03bd669123487905c47ae27dbdaac","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"ed1f67465327cec4457bb988775245b199da86e6","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"3ed8832aeaa9a37b0fc386bb72ff604352567c80","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"630146203108bf6b8934eec0dfdb3e46dcb917de","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"7eeacc6728c5478e3c01bc82a1f08958eaa12366","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"dabe299425b1a53a69461fed7ac8922ea6733a25","status":"affected","versionType":"git"},{"version":"1879445dfa7bbd6fe21b09c5cc72f4934798afed","lessThan":"a506bd5756290821a4314f502b4bafc2afcf5260","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"],"versions":[{"version":"4.7","status":"affected"},{"version":"0","lessThan":"4.7","status":"unaffected","versionType":"semver"},{"version":"4.9.269","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.233","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.191","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.120","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.38","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.11.22","lessThanOrEqual":"5.11.*","status":"unaffected","versionType":"semver"},{"version":"5.12.5","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":"4.7","versionEndExcluding":"4.9.269"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"4.14.233"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"4.19.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.4.120"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.10.38"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.11.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.12.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac"},{"url":"https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6"},{"url":"https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb"},{"url":"https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80"},{"url":"https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de"},{"url":"https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366"},{"url":"https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25"},{"url":"https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260"}],"title":"ARM: 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