CVE-2026-43428

USB: core: Limit the length of unkillable synchronous timeouts

State: Published
Severity: Not scored
Published: May 8, 2026
Updated: May 11, 2026
Reserved: May 1, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4e86f5b79e62ded7e3c3ebd688cf5775e618148aAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 06d2bbc4c66c6b0e8a43728c4949026026a5be67Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 6c62935670acdbb7687ced20494923b66fbb0367Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 659c0c7d50a4b0f6aa197c4c098cfd91daf63862Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24b31a227f679a942d820840a4dea7f0c09a387fAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 64f3d75633aedc12bdff220e9a4337177430bd9dAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2d34cb4d1d6283b4be9c78f4a83ed6956d3069ecAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1015c27a5e1a63efae2b18a9901494474b4d1dc3Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.167 through 6.1.Not affected 6.6.130 through 6.6.Not affected 6.12.78 through 6.12.Not affected 6.18.19 through 6.18.Not affected 6.19.9 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 4e86f5b79e62ded7e3c3ebd688cf5775e618148aAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 06d2bbc4c66c6b0e8a43728c4949026026a5be67Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 6c62935670acdbb7687ced20494923b66fbb0367Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 659c0c7d50a4b0f6aa197c4c098cfd91daf63862Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 24b31a227f679a942d820840a4dea7f0c09a387fAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 64f3d75633aedc12bdff220e9a4337177430bd9dAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2d34cb4d1d6283b4be9c78f4a83ed6956d3069ecAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 1015c27a5e1a63efae2b18a9901494474b4d1dc3Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.167 through 6.1.*Not affected
6.6.130 through 6.6.*Not affected
6.12.78 through 6.12.*Not affected
6.18.19 through 6.18.*Not affected
6.19.9 through 6.19.*Not affected
7.0 and laterNot affected

References

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