Medium 5.5Published May 8, 2026

CVE-2026-43428USB: core: Limit the length of unkillable synchronous timeouts

Updated under an hour ago (Oct 27, 2026, 8:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4e86f5b79e62ded7e3c3ebd688cf5775e618148a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 06d2bbc4c66c6b0e8a43728c4949026026a5be67; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6c62935670acdbb7687ced20494923b66fbb0367; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 659c0c7d50a4b0f6aa197c4c098cfd91daf63862; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 24b31a227f679a942d820840a4dea7f0c09a387f; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 64f3d75633aedc12bdff220e9a4337177430bd9d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2d34cb4d1d6283b4be9c78f4a83ed6956d3069ec; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1015c27a5e1a63efae2b18a9901494474b4d1dc3	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.12.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19; from 6.19 before 6.19.9; 2.6.12; and 8 more ranges	NVD

References

References

https://git.kernel.org/stable/c/4e86f5b79e62ded7e3c3ebd688cf5775e618148a	patch
https://git.kernel.org/stable/c/06d2bbc4c66c6b0e8a43728c4949026026a5be67	patch
https://git.kernel.org/stable/c/6c62935670acdbb7687ced20494923b66fbb0367	patch
https://git.kernel.org/stable/c/659c0c7d50a4b0f6aa197c4c098cfd91daf63862	patch
https://git.kernel.org/stable/c/24b31a227f679a942d820840a4dea7f0c09a387f	patch
https://git.kernel.org/stable/c/64f3d75633aedc12bdff220e9a4337177430bd9d	patch
https://git.kernel.org/stable/c/2d34cb4d1d6283b4be9c78f4a83ed6956d3069ec	patch
https://git.kernel.org/stable/c/1015c27a5e1a63efae2b18a9901494474b4d1dc3	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.