#VU113398 Input validation error in Linux kernel - CVE-2025-38491
Published: July 29, 2025
Vulnerability identifier: #VU113398
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-2025-38491
CWE-ID: CWE-20
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 improper input validation within the subflow_finish_connect(), WRITE_ONCE(), __mptcp_subflow_connect() and subflow_state_change() functions in net/mptcp/subflow.c, within the mptcp_check_data_fin(), __mptcp_finish_join(), mptcp_update_infinite_map(), mptcp_check_fastclose(), __mptcp_retrans(), __mptcp_init_sock() and mptcp_finish_join() functions in net/mptcp/protocol.c, within the check_fully_established() function in net/mptcp/options.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's repository.