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CVE-2021-47006

Disclosure Date: February 28, 2024 •
CVE-2021-47006
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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/

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CVSS V3 Severity and Metrics
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General Information

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Vulnerable Versions
Linux 555a70f7fff0
Linux not down converted
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Vendors

  • Linux

Products

  • Linux
Technical Analysis