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CVE-2026-63898

In the Linux kernel, the following vulnerability has been resolved: USB: serial: mct_u232: fix memory corruption with small endpoint The driver overrides the maximum transfer size for a specific…

Published Jul 19, 2026EPSS 0.23%

Overview

CVE-2026-63898 is a known-severity vulnerability. It was published on July 19, 2026.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: mct_u232: fix memory corruption with small endpoint

The driver overrides the maximum transfer size for a specific device

which only accepts 16 byte packets for its 32 byte bulk-out endpoint.

Make sure to never increase the maximum transfer size to prevent slab

corruption should a malicious device report a smaller endpoint max

packet size than expected.

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/39e295a91e80f3b91f61c7ada2bde434dcaba20dRefgit.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5bRefgit.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5Refgit.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742dRefgit.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3Refgit.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935Refgit.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869eRefgit.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768

How CyberStrike helps

Frequently asked questions

What is CVE-2026-63898?

CVE-2026-63898 is a known-severity vulnerability. It was published on July 19, 2026.

How severe is CVE-2026-63898?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-63898?

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-2026-63898?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-63898 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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