CVE-2025-38448
published 2025-07-25CVE-2025-38448: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Fix race condition in TTY wakeup A race condition occurs when…
medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: u_serial: Fix race condition in TTY wakeup
A race condition occurs when gs_start_io() calls either gs_start_rx() or
gs_start_tx(), as those functions briefly drop the port_lock for
usb_ep_queue(). This allows gs_close() and gserial_disconnect() to clear
port.tty and port_usb, respectively.
Use the null-safe TTY Port helper function to wake up TTY.
Example
CPU1: CPU2:
gserial_connect() // lock
gs_close() // await lock
gs_start_rx() // unlock
usb_ep_queue()
gs_close() // lock, reset port.tty and unlock
gs_start_rx() // lock
tty_wakeup() // NPE
Affected
38 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < 18d58a467ccf011078352d91b4d6a0108c7318e8 | 18d58a467ccf011078352d91b4d6a0108c7318e8 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < d43657b59f36e88289a6066f15bc9a80df5014eb | d43657b59f36e88289a6066f15bc9a80df5014eb |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < a5012673d49788f16bb4e375b002d7743eb642d9 | a5012673d49788f16bb4e375b002d7743eb642d9 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < ee8d688e2ba558f3bb8ac225113740be5f335417 | ee8d688e2ba558f3bb8ac225113740be5f335417 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < c6eb4a05af3d0ba3bc4e8159287722fb9abc6359 | c6eb4a05af3d0ba3bc4e8159287722fb9abc6359 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < abf3620cba68e0e51e5c21054ce4f925f75b3661 | abf3620cba68e0e51e5c21054ce4f925f75b3661 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < c8c80a3a35c2e3488409de2d5376ef7e662a2bf5 | c8c80a3a35c2e3488409de2d5376ef7e662a2bf5 |
| linux | linux | >= 35f95fd7f234d2b58803bab6f6ebd6bb988050a2 < c529c3730bd09115684644e26bf01ecbd7e2c2c9 | c529c3730bd09115684644e26bf01ecbd7e2c2c9 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.147-1 | 6.1.147-1 |
| linux | linux_kernel | >= 0 < 6.12.41-1 | 6.12.41-1 |
| linux | linux_kernel | >= 0 < 6.16.3-1 | 6.16.3-1 |
| linux | linux_kernel | >= 0 < 5.15.0-156.166 | 5.15.0-156.166 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 3.5 < 5.4.296 | 5.4.296 |
| linux | linux_kernel | >= 5.11 < 5.15.189 | 5.15.189 |
| linux | linux_kernel | >= 5.16 < 6.1.146 | 6.1.146 |
| linux | linux_kernel | >= 5.5 < 5.10.240 | 5.10.240 |
| linux | linux_kernel | >= 6.13 < 6.15.7 | 6.15.7 |
| linux | linux_kernel | >= 6.2 < 6.6.99 | 6.6.99 |
CVSS provenance
nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv4.7MEDIUM