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CVE-2024-49977

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix zero-division error when disabling tc cbs The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed di…

Published Oct 21, 2024CWE-369EPSS 0.25%

Overview

CVE-2024-49977 is a medium-severity vulnerability. It was published on October 21, 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:

net: stmmac: Fix zero-division error when disabling tc cbs

The commit b8c43360f6e4 ("net: stmmac: No need to calculate speed divider

when offload is disabled") allows the "port_transmit_rate_kbps" to be

set to a value of 0, which is then passed to the "div_s64" function when

tc-cbs is disabled. This leads to a zero-division error.

When tc-cbs is disabled, the idleslope, sendslope, and credit values the

credit values are not required to be configured. Therefore, adding a return

statement after setting the txQ mode to DCB when tc-cbs is disabled would

prevent a zero-division error.

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/03582f4752427f60817d896f1a827aff772bd31eRefgit.kernel.org/stable/c/5d43e1ad4567d67af2b42d3ab7c14152ffed25c6Refgit.kernel.org/stable/c/675faf5a14c14a2be0b870db30a70764df81e2dfRefgit.kernel.org/stable/c/837d9df9c0792902710149d1a5e0991520af0f93Refgit.kernel.org/stable/c/b0da9504a528f05f97d926b4db74ff21917a33e9Refgit.kernel.org/stable/c/e297a2bf56d12fd7f91a0c209eb6ea84361f3368Refgit.kernel.org/stable/c/e33fe25b1efe4f2e6a5858786dbc82ae4c44ed4cReflists.debian.org/debian-lts-announce/2025/01/msg00001.htmlReflists.debian.org/debian-lts-announce/2025/03/msg00002.htmlRefcert-portal.siemens.com/productcert/html/ssa-265688.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-49977?

CVE-2024-49977 is a medium-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-49977?

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-2024-49977?

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-2024-49977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-49977 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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