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CVE-2024-43890

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix overflow in get_free_elt() "tracing_map->next_elt" in get_free_elt() is at risk of overflowing.

Published Aug 26, 2024CWE-190EPSS 0.26%

Overview

CVE-2024-43890 is a medium-severity vulnerability. It was published on August 26, 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:

tracing: Fix overflow in get_free_elt()

"tracing_map->next_elt" in get_free_elt() is at risk of overflowing.

Once it overflows, new elements can still be inserted into the tracing_map

even though the maximum number of elements (`max_elts`) has been reached.

Continuing to insert elements after the overflow could result in the

tracing_map containing "tracing_map->max_size" elements, leaving no empty

entries.

If any attempt is made to insert an element into a full tracing_map using

`__tracing_map_insert()`, it will cause an infinite loop with preemption

disabled, leading to a CPU hang problem.

Fix this by preventing any further increments to "tracing_map->next_elt"

once it reaches "tracing_map->max_elt".

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/236bb4690773ab6869b40bedc7bc8d889e36f9d6Refgit.kernel.org/stable/c/302ceb625d7b990db205a15e371f9a71238de91cRefgit.kernel.org/stable/c/788ea62499b3c18541fd6d621964d8fafbc4aec5Refgit.kernel.org/stable/c/a172c7b22bc2feaf489cfc6d6865f7237134fdf8Refgit.kernel.org/stable/c/bcf86c01ca4676316557dd482c8416ece8c2e143Refgit.kernel.org/stable/c/cd10d186a5409a1fe6e976df82858e9773a698daRefgit.kernel.org/stable/c/d3e4dbc2858fe85d1dbd2e72a9fc5dea988b5c18Refgit.kernel.org/stable/c/eb223bf01e688dfe37e813c8988ee11c8c9f8d0aReflists.debian.org/debian-lts-announce/2024/10/msg00003.htmlReflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-43890?

CVE-2024-43890 is a medium-severity vulnerability. It was published on August 26, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-43890?

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-2024-43890?

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-2024-43890?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-43890 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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