CVE-2026-64334
kernel: USB: serial: digi_acceleport: fix hard lockup on disconnect
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 25, 2026
Updated · September 4, 2026
Description
A flaw was found in the Linux kernel's digi_acceleport USB serial driver. This vulnerability occurs when a USB device using the driver is disconnected, and operations such as opening or closing the device are happening concurrently. Persistent errors in sending out-of-band (OOB) write Universal Serial Bus Request Blocks (URBs) can cause the driver to enter an indefinite loop with interrupts disabled. This leads to a system hard lockup, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')