CVE-2026-43428 Details
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.
A vulnerability in the Linux kernel's USB core has been addressed, which involved unbounded timeout durations in the usb_control_msg(), usb_bulk_msg(), and usb_interrupt_msg() APIs. These APIs allowed infinite timeout values, leading to uninterruptible waits that could hang a task indefinitely. The only way to terminate such a task would be to unplug the device. To mitigate this issue, a maximum timeout limit of 60 seconds has been introduced for non-killable waits. This change aims to prevent tasks from hanging indefinitely, especially on systems where such delays could trigger the kernel's hung-task detector. Additionally, the handling of negative timeout values has been clarified; they are now treated as zero, effectively using the maximum allowed timeout.
Users can update to the latest version of the Linux kernel where this vulnerability has been fixed. Instructions for updating the kernel can be found in the official Linux kernel documentation.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/06d2bbc4c66c6b0e8a43728c4949026026a5be67 | kernel.org | Patch |
| https://git.kernel.org/stable/c/1015c27a5e1a63efae2b18a9901494474b4d1dc3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/24b31a227f679a942d820840a4dea7f0c09a387f | kernel.org | Patch |
| https://git.kernel.org/stable/c/2d34cb4d1d6283b4be9c78f4a83ed6956d3069ec | kernel.org | Patch |
| https://git.kernel.org/stable/c/4e86f5b79e62ded7e3c3ebd688cf5775e618148a | kernel.org | Patch |
| https://git.kernel.org/stable/c/64f3d75633aedc12bdff220e9a4337177430bd9d | kernel.org | Patch |
| https://git.kernel.org/stable/c/659c0c7d50a4b0f6aa197c4c098cfd91daf63862 | kernel.org | Patch |
| https://git.kernel.org/stable/c/6c62935670acdbb7687ced20494923b66fbb0367 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.12.1, < 5.10.253 >= 5.11, < 5.15.203 >= 5.16, < 6.1.167 >= 6.2, < 6.6.130 >= 6.7, < 6.12.78 >= 6.13, < 6.18.19 >= 6.19, < 6.19.9 2.6.12 - 2.6.12 rc2 2.6.12 rc3 2.6.12 rc4 2.6.12 rc5 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 20, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | New CVE Received | kernel.org |