CVE-2026-64336
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.
How to fix
- linux linux_kernel5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 or later
- git.kernel.org/stable/c/2f7a6b8ab3845bd1da02604f1a874b52a4555a72
- git.kernel.org/stable/c/6bfc8d01ac4068eced509f8fc74d0cd205e4dcec
- git.kernel.org/stable/c/b069b7029862fafaff331d4c664d97d4ae828d6d
- git.kernel.org/stable/c/cf6ca0aefae03958cfb5b189b0adbfb25c06bfac
- git.kernel.org/stable/c/d4b12b6b395e43a2b1d80be3745631fcaa9c047b
- git.kernel.org/stable/c/e1494191a3aac665d3a2fce16169a97c346253ec
- git.kernel.org/stable/c/e52ca411f50539ff1d0c877b9312771ca8a858c1
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.11 ≤ v < 5.15.212, 5.16 ≤ v < 6.1.178, 6.2 ≤ v < 6.6.145, 6.7 ≤ v < 6.12.96, 6.13 ≤ v < 6.18.39, 6.19 ≤ v < 7.1.4, 7.2 | 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 |
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