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CVE-2026-63898

Published Jul 19, 2026 EPSS 0.22% (12th pctl)

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

Ref git.kernel.org/stable/c/39e295a91e80f3b91f61c7ada2bde434dcaba20d Ref git.kernel.org/stable/c/57f332af1745014cd7e40414814ffaa6bc7d3b5b Ref git.kernel.org/stable/c/6cb48f8890f9b2051d7c34823057296a536a31c5 Ref git.kernel.org/stable/c/90dbad14b109e5fdfb4934ff61e561d11ba3742d Ref git.kernel.org/stable/c/915b36d701950503c4ea0f6e314b10868e59fce3 Ref git.kernel.org/stable/c/94edbbc5fe00d03cfe1d4e690d7d2cd36317a935 Ref git.kernel.org/stable/c/bd2ddb3fe9052ad8703593bbec26ecc7ca92869e Ref git.kernel.org/stable/c/d8fdf33d6fcfb90cbec26299baf2352c84b2d768

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's AI-powered security agents can automatically detect CVE-2026-63898 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

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Code Review

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.
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