CVE-2025-38448
Linux Kernel USB Gadget u_serial Race Condition
Description
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
INFO
Published Date :
July 25, 2025, 4:15 p.m.
Last Modified :
July 29, 2025, 2:14 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Upgrade the affs-modules-6.1.0-37-4kc-malta-di packages.
Public PoC/Exploit Available at Github
CVE-2025-38448 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-38448.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-38448 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-38448
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-38448 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-38448 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2025
Action Type Old Value New Value Added Description 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 Added Reference https://git.kernel.org/stable/c/18d58a467ccf011078352d91b4d6a0108c7318e8 Added Reference https://git.kernel.org/stable/c/a5012673d49788f16bb4e375b002d7743eb642d9 Added Reference https://git.kernel.org/stable/c/abf3620cba68e0e51e5c21054ce4f925f75b3661 Added Reference https://git.kernel.org/stable/c/c529c3730bd09115684644e26bf01ecbd7e2c2c9 Added Reference https://git.kernel.org/stable/c/c6eb4a05af3d0ba3bc4e8159287722fb9abc6359 Added Reference https://git.kernel.org/stable/c/c8c80a3a35c2e3488409de2d5376ef7e662a2bf5 Added Reference https://git.kernel.org/stable/c/d43657b59f36e88289a6066f15bc9a80df5014eb Added Reference https://git.kernel.org/stable/c/ee8d688e2ba558f3bb8ac225113740be5f335417