SB20240608125 - Infinite loop in Linux kernel mptcp
Published: June 8, 2024 Updated: May 13, 2025
Security Bulletin ID
SB20240608125
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) Infinite loop (CVE-ID: CVE-2021-47448)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the mptcp_check_data_fin(), mptcp_data_ready(), mptcp_check_for_eof(), mptcp_wait_data(), mptcp_recvmsg(), tcp_recv_timestamp(), mptcp_check_fastclose(), mptcp_check_readable() and mptcp_poll() functions in net/mptcp/protocol.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.