SB2025012039 - NULL pointer dereference in Linux kernel sctp
Published: January 20, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025012039
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2025-21639)
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.
References
- 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