CVE-2026-46158: mptcp: pm: ADD_ADDR rtx: always decrease sk refcount
In the Linux kernel, the following vulnerability has been resolved:
Other sources
mptcp: pm: ADDADDR rtx: always decrease sk refcount
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.143.1-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.187-1Fixed in 6.12.107-1Fixed in 7.2.6-1Fixed in 7.2.7-1
Event History
Frequently Asked Questions
What access would an attacker need to exploit this issue?
The CVSS vector indicates local access and low privileges are required. No user interaction is required, and attack complexity is rated low.
What is the expected security impact?
The issue can cause a socket reference-count leak during ADD_ADDR retransmission handling. It is rated as having high availability impact, with no confidentiality or integrity impact.
Which systems are identified in the available data?
The affected software listing includes the Linux kernel and Microsoft azl3 kernel version 6.6.141.1-1.
Are fixed package or kernel versions provided?
No fixed version is provided in the available data. Three stable-kernel commit references are supplied for identifying the remediation.