Resource exhaustion in Linux kernel - CVE-2026-53183
Published: June 26, 2026
Vulnerability identifier: #VU135608
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2026-53183
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-53183
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/653245266913f03fcf21cbca68eed5c197a33e52
- https://git.kernel.org/stable/c/aa3861f40ac32706d9e97bfac76984613e278788
- https://git.kernel.org/stable/c/b1fd13074f22105deec45aa02283e322733e0c2d
- https://git.kernel.org/stable/c/bf364b0f10b27679140699821f88af7f01e2a6e3
- https://git.kernel.org/stable/c/c297a4e65c50a2b807d9309b22615080faffa8f3
- https://git.kernel.org/stable/c/da23be77e1292cd611e736c3aa17da633d7ddce7