Go to homepageCyberStrike

Menu

Star on GitHub · 3.4k
Sign inDownload

CVE-2021-47006

5.5 · MEDIUM

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 ev…

Published Feb 28, 2024EPSS 0.25%

Overview

CVE-2021-47006 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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/[email protected]/

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Refgit.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaacRefgit.kernel.org/stable/c/630146203108bf6b8934eec0dfdb3e46dcb917deRefgit.kernel.org/stable/c/7eeacc6728c5478e3c01bc82a1f08958eaa12366Refgit.kernel.org/stable/c/a506bd5756290821a4314f502b4bafc2afcf5260Refgit.kernel.org/stable/c/a9938d6d78a238d6ab8de57a4d3dcf77adceb9bbRefgit.kernel.org/stable/c/dabe299425b1a53a69461fed7ac8922ea6733a25Refgit.kernel.org/stable/c/ed1f67465327cec4457bb988775245b199da86e6Refgit.kernel.org/stable/c/3ed8832aeaa9a37b0fc386bb72ff604352567c80Refgit.kernel.org/stable/c/555a70f7fff03bd669123487905c47ae27dbdaac

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47006?

CVE-2021-47006 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47006?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47006?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47006?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47006 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999
LiveWatch live →