CVE-2025-40094
kernel: Linux kernel: Denial of Service via NULL pointer dereference in USB gadget f_acm
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 30, 2025
Updated · July 30, 2026
Description
A flaw was found in the Linux kernel's USB gadget 'f_acm' function. This vulnerability allows a local attacker with low privileges to cause a system crash, leading to a Denial of Service (DoS). The issue occurs when a stale request is not properly handled after a bind/unbind cycle, resulting in a NULL pointer dereference if a subsequent bind operation fails.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference