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CVE-2026-64340

Published Jul 25, 2026 EPSS 0.18% (7th pctl)

Overview

CVE-2026-64340 is a known-severity vulnerability. It was published on July 25, 2026.

Technical Description

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

USB: legousbtower: fix use-after-free on disconnect race

mutex_unlock() may access the mutex structure after releasing the lock

and therefore cannot be used to manage lifetime of objects directly

(unlike spinlocks and refcounts). [1][2]

Use a kref to release the driver data to avoid use-after-free in

mutex_unlock() when release() races with disconnect().

[1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is

non-atomic")

[2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most

other sleeping locks, can still use the lock object

after it's unlocked")

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/0b57e5ddbd89df3bc367463de3d2ca66f99a1a5e Ref git.kernel.org/stable/c/11d069f85851997b4ea0adf242ed9672dc749b8f Ref git.kernel.org/stable/c/62fc8eb1b1481051f7bab4aa93d79809053dd09f Ref git.kernel.org/stable/c/6462de75d2e370c7e74dcfb7b4ae79eb5a6a55ee Ref git.kernel.org/stable/c/766738ecf2b819e54d38763c8d1c8ae6cff14b39 Ref git.kernel.org/stable/c/9ba62966461a8e3cc593b62c56ec62eb2d80436d Ref git.kernel.org/stable/c/ab2bfd7bec4f134b377ec42f513e90c35db94160 Ref git.kernel.org/stable/c/b4222c05066b252b451f9c8c4730b5b60824ea66

Frequently Asked Questions

What is CVE-2026-64340?

CVE-2026-64340 is a known-severity vulnerability. It was published on July 25, 2026.

How severe is CVE-2026-64340?

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-2026-64340?

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-2026-64340?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-64340 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.

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