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CVE-2021-47190

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: perf bpf: Avoid memory leak from perf_env__insert_btf() perf_env__insert_btf() doesn't insert if a duplicate BTF id is encounte…

Published Apr 10, 2024CWE-401EPSS 0.23%

Overview

CVE-2021-47190 is a medium-severity vulnerability. It was published on April 10, 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:

perf bpf: Avoid memory leak from perf_env__insert_btf()

perf_env__insert_btf() doesn't insert if a duplicate BTF id is

encountered and this causes a memory leak. Modify the function to return

a success/error value and then free the memory if insertion didn't

happen.

v2. Adds a return -1 when the insertion error occurs in

perf_env__fetch_btf. This doesn't affect anything as the result is

never checked.

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/11589d3144bc4e272e0aae46ce8156162e99babcRefgit.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1fRefgit.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2Refgit.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56eRefgit.kernel.org/stable/c/11589d3144bc4e272e0aae46ce8156162e99babcRefgit.kernel.org/stable/c/4924b1f7c46711762fd0e65c135ccfbcfd6ded1fRefgit.kernel.org/stable/c/642fc22210a5e59d40b1e4d56d21ec3effd401f2Refgit.kernel.org/stable/c/ab7c3d8d81c511ddfb27823fb07081c96422b56e

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47190?

CVE-2021-47190 is a medium-severity vulnerability. It was published on April 10, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47190?

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-2021-47190?

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-2021-47190?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47190 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.

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