SB2025122648 - Memory leak in Linux kernel mptcp
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB2025122648
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) Memory leak (CVE-ID: CVE-2022-50783)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the subflow_req_destructor(), subflow_v4_conn_request(), subflow_v6_conn_request(), subflow_ops_init() and mptcp_subflow_init() functions in net/mptcp/subflow.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/092953f3c4cd65f88b27b87a922f6c725f34ee04
- https://git.kernel.org/stable/c/1922ea6b0ae2ea0c9a09be0eafafe1cd1069d259
- https://git.kernel.org/stable/c/6eb02c596ec02e5897ae377e065cb7df55337a96
- https://git.kernel.org/stable/c/bd5dc96fea4edd16d2e22f41b4dd50a4cfbeb919
- https://git.kernel.org/stable/c/d3295fee3c756ece33ac0d935e172e68c0a4161b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.163
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.87
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2