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CVE-2026-46158

kernel: mptcp: pm: ADD_ADDR rtx: always decrease sk refcount

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · May 28, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's Multipath TCP (MPTCP) implementation. When an ADD_ADDR message is retransmitted, a socket reference count may not be properly decreased, leading to a potential resource leak. Over time, this resource exhaustion could allow a remote attacker to cause a Denial of Service (DoS) by consuming system resources.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-911 · Improper Update of Reference Count