Improper locking in Linux kernel - CVE-2025-40140
Published: November 12, 2025
Vulnerability identifier: #VU118417
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-40140
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the rtl8150_set_multicast() function in drivers/net/usb/rtl8150.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-40140
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/114e05344763a102a8844efd96ec06ba99293ccd
- https://git.kernel.org/stable/c/1a08a37ac03d07a1608a1592791041cac979fbc3
- https://git.kernel.org/stable/c/54f8ef1a970a8376e5846ed90854decf7c00555d
- https://git.kernel.org/stable/c/6053e47bbf212b93c051beb4261d7d5a409d0ce3
- https://git.kernel.org/stable/c/6394bade9daab8e318c165fe43bba012bf13cd8e
- https://git.kernel.org/stable/c/958baf5eaee394e5fd976979b0791a875f14a179
- https://git.kernel.org/stable/c/9d72df7f5eac946f853bf49c428c4e87a17d91da
- https://git.kernel.org/stable/c/cce3c0e21cdd15bcba5c35d3af1700186de8f187