Detections
Analytics
CVE-2026-64336
high
Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: keyspan_pda: fix information leak The write() callback is supposed to return the number of characters accepted or a negative errno. Since the addition of write fifo support the keyspan_pda implementation will however return the number characters submitted to the device if the write urb is not already in use. If this number is larger than the number of characters passed to write(), the line discipline continues writing data from beyond the tty write buffer. Fix the information leak by making sure that keyspan_pda_write_start() returns zero on success as intended.
References
https://git.kernel.org/stable/c/e52ca411f50539ff1d0c877b9312771ca8a858c1
https://git.kernel.org/stable/c/e1494191a3aac665d3a2fce16169a97c346253ec
https://git.kernel.org/stable/c/d4b12b6b395e43a2b1d80be3745631fcaa9c047b
https://git.kernel.org/stable/c/cf6ca0aefae03958cfb5b189b0adbfb25c06bfac
https://git.kernel.org/stable/c/b069b7029862fafaff331d4c664d97d4ae828d6d
https://git.kernel.org/stable/c/6bfc8d01ac4068eced509f8fc74d0cd205e4dcec
https://git.kernel.org/stable/c/2f7a6b8ab3845bd1da02604f1a874b52a4555a72