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CVE-2026-98131

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix dma mapping leak in stmmac_tso_xmit() In stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the f…

Published Sep 25, 2026linuxCWE-401EPSS 0.12%

Overview

CVE-2026-98131 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 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: stmmac: fix dma mapping leak in stmmac_tso_xmit()

In stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the

frame is dropped but the DMA mappings already created for the linear

part and for the fragments mapped before the failure are never

unmapped, leaking DMA mappings.

Fix the leak by walking back over the descriptors used by the frame and

releasing each of them with stmmac_free_tx_buffer(). Moreover, release

the descriptors with stmmac_release_tx_desc() unmapping the DMA buffers.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 4.7, < 7.2.7Affected

References

Refgit.kernel.org/stable/c/8a3257f142ae513d0c96d42f97386d4941bcec29Refgit.kernel.org/stable/c/a5d946466a95621fa2769720d59ea336003aa1a5Refgit.kernel.org/stable/c/c5449b635362cb678d29d8f6ab54e65734d891ceRefgit.kernel.org/stable/c/e85adaac3dc6317cae902372c6849189ec62cf7d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98131?

CVE-2026-98131 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-98131?

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-2026-98131?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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-2026-98131?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98131 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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