#VU103026 NULL pointer dereference in Linux kernel - CVE-2025-21639
Published: January 20, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU103026
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-2025-21639
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_hmac_alg() and proc_sctp_do_rto_min() functions 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/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482
- https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5
- https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e
- https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.72