Improper locking in Linux kernel - CVE-2025-21862
Published: March 12, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105670
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-2025-21862
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 init_net_drop_monitor() and exit_net_drop_monitor() functions in net/core/drop_monitor.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21862
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/07b598c0e6f06a0f254c88dafb4ad50f8a8c6eea
- https://git.kernel.org/stable/c/0efa6c42f81c60d8f72ba7f5ed8d4fec8c526282
- https://git.kernel.org/stable/c/219a47d0e6195bd202f22855e35f25bd15bc4d58
- https://git.kernel.org/stable/c/b7859e8643e75619b2705b4fcac93ffd94d72b4a
- https://git.kernel.org/stable/c/fcfc00bfec7bb6661074cb21356d05a4c9470a3c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.130