CVE-2021-47006
In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default…
Does this matter?
Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook The commit 1879445dfa7b ("perf/core: Set event's default ::overflow_handler()") set a default event->overflow_handler in perf_event_alloc(), and replace the check event->overflow_handler with is_default_overflow_handler(), but one is missing. Currently, the bp->overflow_handler can not be NULL. As a result, enable_single_step() is always not invoked. Comments from Zhen Lei: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Patch
- https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaacPatch
- https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917dePatch
- https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366Patch
- https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260Patch
- https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bbPatch
- https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25Patch
- https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6Patch
- https://git.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Patch
- https://git.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaacPatch
- https://git.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917dePatch
- https://git.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366Patch
- https://git.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260Patch
- https://git.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bbPatch
- https://git.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25Patch
- https://git.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.