What’s Vulnerable › Vulnerabilities

CVE-2026-46137: mptcp: pm: ADD_ADDR rtx: fix potential data-race

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-19
• Weakness: CWE-362

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.

Affected products

• Linux kernel: from 5.10 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.30 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.12.91, 6.18.30, 6.6.141

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.12.91. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5
• https://git.kernel.org/stable/c/23079e0b7742ec114d3507c3e3aad01b7b69e4af
• https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513
• https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d
• https://git.kernel.org/stable/c/6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3
• https://git.kernel.org/stable/c/b35605e1f1e877038c8c9d499babbc891cdd234f
• https://git.kernel.org/stable/c/cc3c0399361efaaf7ae64262eb3f70829b1189c6
• https://git.kernel.org/stable/c/d9b272a85fe6b8f993e37915311e4038c814a533
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Get alerted when CVE-2026-46137 or the next vulnerability affects your stack