{"id":"CVE-2021-47006","details":"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-\u003eoverflow_handler in\nperf_event_alloc(), and replace the check event-\u003eoverflow_handler with\nis_default_overflow_handler(), but one is missing.\n\nCurrently, the bp-\u003eoverflow_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/","modified":"2026-03-15T22:42:43.769210Z","published":"2024-02-28T09:15:38.453Z","related":["SUSE-SU-2024:1454-1","SUSE-SU-2024:1465-1","SUSE-SU-2024:1489-1","SUSE-SU-2024:1643-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1870-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6"},{"type":"FIX","url":"https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80"},{"type":"FIX","url":"https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac"},{"type":"FIX","url":"https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917de"},{"type":"FIX","url":"https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260"},{"type":"FIX","url":"https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47006.json","unresolved_ranges":[{"events":[{"introduced":"4.7"},{"fixed":"4.9.269"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.233"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.191"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.120"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.38"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.11.22"}]},{"events":[{"introduced":"5.12"},{"fixed":"5.12.5"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}