SB20260626166 - Resource exhaustion in Linux kernel mptcp

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260626166

SB20260626166 - Resource exhaustion in Linux kernel mptcp

Published: June 26, 2026

Security Bulletin ID SB20260626166
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Resource exhaustion (CVE-ID: CVE-2026-53183)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper resource management in MPTCP DSS option handling in net/mptcp/options.c when processing incoming MPTCP traffic with out-of-order data in the MPTCP sequence space or data landing in the backlog. A remote attacker can send traffic that triggers artificial inflation of the MPTCP receive window to cause a denial of service.

The issue can allow incoming traffic to exceed the receiver rcvbuf size even when the sender is not misbehaving.


Remediation

Install update from vendor's website.

References