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CVE-2026-31736

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled If the gmac0 is disabled, the precheck for a valid ingress devi…

Published May 1, 2026CWE-476EPSS 0.16%

Overview

CVE-2026-31736 is a medium-severity vulnerability. It was published on May 1, 2026 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: ethernet: mtk_ppe: avoid NULL deref when gmac0 is disabled

If the gmac0 is disabled, the precheck for a valid ingress device will

cause a NULL pointer deref and crash the system. This happens because

eth->netdev[0] will be NULL but the code will directly try to access

netdev_ops.

Instead of just checking for the first net_device, it must be checked if

any of the mtk_eth net_devices is matching the netdev_ops of the ingress

device.

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/0b832aad33e6f160fda310f0306a6483d85e9d6eRefgit.kernel.org/stable/c/5dff799c677152dde963c3917bacd9127b03e145Refgit.kernel.org/stable/c/7b2380f0a0e374010c1a4a13203511b9dee5b166Refgit.kernel.org/stable/c/976ff48c2ac6e6b25b01428c9d7997bcd0fb2949

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31736?

CVE-2026-31736 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31736?

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-2026-31736?

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-2026-31736?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31736 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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