Tracker / CVE-2025-21704
CVE-2025-21704
In the Linux kernel, the following vulnerability has been resolved: usb: cdc-acm: Check control transfer buffer size before access If the first fragment is shorter than struct usb_cdc_notification, we can't calculate an expected_size. Log an error and discard the notification instead of reading lengths from memory outside the received data, which can lead to memory corruption when the expected_size decreases between fragments, causing `expected_size - acm->nb_index` to wrap. This issue has been present since the beginning of git history; however, it only leads to memory corruption since commit ea2583529cd1 ("cdc-acm: reassemble fragmented notifications"). A mitigating factor is that acm_ctrl_irq() can only execute after userspace has opened /dev/ttyACM*; but if ModemManager is running, ModemManager will do that automatically depending on the USB device's vendor/product IDs and its other interfaces.
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.13 → 5.4.291 |
| linux | linux_kernel · 5.11 → 5.15.179 |
| linux | linux_kernel · 5.16 → 6.1.129 |
| linux | linux_kernel · 5.5 → 5.10.235 |
| linux | linux_kernel · 6.13 → 6.13.4 |
| linux | linux_kernel · 6.2 → 6.6.79 |
| linux | linux_kernel · 6.7 → 6.12.16 |