#VU103025 NULL pointer dereference in Linux kernel - CVE-2025-21638
Published: January 20, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU103025
Vulnerability risk: Low
CVSSv4.0: 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-2025-21638
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
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 proc_sctp_do_alpha_beta() function in net/sctp/sysctl.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695
- https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3
- https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6
- https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.10