The Linux kernel's USB serial driver digi_acceleport had a vulnerability where the digi_write_inb_command() function did not properly handle write URB availability timeouts. Instead of returning an error on timeout, it updated the transfer buffer and attempted to resubmit the URB, causing write buffer corruption. Additionally, for commands without timeouts, a broken jiffies comparison on 32-bit machines could trigger immediate corruption after five minutes of uptime. The patch corrects this by adding the missing return statement on timeout and implementing indefinite waiting when no timeout is specified, preventing buffer corruption.

This vulnerability could lead to write buffer corruption in the USB serial driver, potentially causing data corruption or instability in affected systems. The issue affects the integrity of data transfers through the digi_acceleport USB serial interface. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should monitor official Linux kernel updates for the fix addressing this issue. Until patched, avoid using affected USB serial devices if possible.