SB2025012042 - NULL pointer dereference in Linux kernel mptcp
Published: January 20, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025012042
CSH 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 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2025-21642)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [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]
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.
Remediation
Install update from vendor's website.
References
- 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