NULL pointer dereference in Linux kernel - CVE-2025-21642
Published: January 20, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU103029
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-2025-21642
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 mptcp_pernet_set_defaults(), mptcp_set_scheduler() and proc_scheduler() functions in net/mptcp/ctrl.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21642
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/6035702381c35a8f16757332381e58b348a9eaf9
- https://git.kernel.org/stable/c/c0e394fd6b887e84da17e38aaa6c1c104f9c86c2
- https://git.kernel.org/stable/c/d38e26e36206ae3d544d496513212ae931d1da0a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.72