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CVE-2026-46137

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential data-race This mptcp_pm_add_timer() helper is executed as a timer callback in softirq co…

Published May 28, 2026CWE-362EPSS 0.48%

Overview

CVE-2026-46137 is a critical-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

mptcp: pm: ADD_ADDR rtx: fix potential data-race

This mptcp_pm_add_timer() helper is executed as a timer callback in

softirq context. To avoid any data races, the socket lock needs to be

held with bh_lock_sock().

If the socket is in use, retry again soon after, similar to what is done

with the keepalive timer.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5Refgit.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4afRefgit.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513Refgit.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550dRefgit.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3Refgit.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234fRefgit.kernel.org/stable/c/cc3c0399361efaaf7ae64262eb3f70829b1189c6Refgit.kernel.org/stable/c/d9b272a85fe6b8f993e37915311e4038c814a533

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46137?

CVE-2026-46137 is a critical-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-46137?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-46137?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46137?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46137 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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