NULL pointer dereference in Linux kernel - CVE-2025-21936
Published: April 2, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106713
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-2025-21936
CWE-ID: CWE-476
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 NULL pointer dereference within the mgmt_device_connected() function in net/bluetooth/mgmt.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21936
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/7841180342c9a0fd97d54f3e62c7369309b5cd84
- https://git.kernel.org/stable/c/7d39387886ffe220323cbed5c155233c3276926b
- https://git.kernel.org/stable/c/bdb1805c248e9694dbb3ffa8867cef2e52cf7261
- https://git.kernel.org/stable/c/d8df010f72b8a32aaea393e36121738bb53ed905
- https://git.kernel.org/stable/c/dc516e66fb28c61b248b393e2ddd63bd7f104969
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.131