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CVE-2026-43428

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: USB: core: Limit the length of unkillable synchronous timeouts The usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() A…

Published May 8, 2026EPSS 0.16%

Overview

CVE-2026-43428 is a medium-severity vulnerability. It was published on May 8, 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:

USB: core: Limit the length of unkillable synchronous timeouts

The usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() APIs in

usbcore allow unlimited timeout durations. And since they use

uninterruptible waits, this leaves open the possibility of hanging a

task for an indefinitely long time, with no way to kill it short of

unplugging the target device.

To prevent this sort of problem, enforce a maximum limit on the length

of these unkillable timeouts. The limit chosen here, somewhat

arbitrarily, is 60 seconds. On many systems (although not all) this

is short enough to avoid triggering the kernel's hung-task detector.

In addition, clear up the ambiguity of negative timeout values by

treating them the same as 0, i.e., using the maximum allowed timeout.

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/06d2bbc4c66c6b0e8a43728c4949026026a5be67Refgit.kernel.org/stable/c/1015c27a5e1a63efae2b18a9901494474b4d1dc3Refgit.kernel.org/stable/c/24b31a227f679a942d820840a4dea7f0c09a387fRefgit.kernel.org/stable/c/2d34cb4d1d6283b4be9c78f4a83ed6956d3069ecRefgit.kernel.org/stable/c/4e86f5b79e62ded7e3c3ebd688cf5775e618148aRefgit.kernel.org/stable/c/64f3d75633aedc12bdff220e9a4337177430bd9dRefgit.kernel.org/stable/c/659c0c7d50a4b0f6aa197c4c098cfd91daf63862Refgit.kernel.org/stable/c/6c62935670acdbb7687ced20494923b66fbb0367

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43428?

CVE-2026-43428 is a medium-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43428?

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-2026-43428?

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-2026-43428?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43428 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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