CVE-2026-46137

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

State: Published
Severity: 9.8 Critical
Published: May 28, 2026
Updated: Oct 19, 2026
Reserved: May 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before d9b272a85fe6b8f993e37915311e4038c814a533Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 23079e0b7742ec114d3507c3e3aad01b7b69e4afAffected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b35605e1f1e877038c8c9d499babbc891cdd234fAffected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 013dcdc1961543b9a3433466bc8c79a2f4ca75b5Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 2ad56e434199ca24a812bb353667aa1c3860f513Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before cc3c0399361efaaf7ae64262eb3f70829b1189c6Affected 00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 5cd6e0ad79d2615264f63929f8b457ad97ae550dAffected
LinuxLinux	5.10Affected before 5.10Not affected 5.10.259 through 5.10.Not affected 5.15.210 through 5.15.Not affected 6.1.176 through 6.1.Not affected 6.6.141 through 6.6.Not affected 6.12.91 through 6.12.Not affected 6.18.30 through 6.18.Not affected 7.0.7 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before d9b272a85fe6b8f993e37915311e4038c814a533Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 23079e0b7742ec114d3507c3e3aad01b7b69e4afAffected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before b35605e1f1e877038c8c9d499babbc891cdd234fAffected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 013dcdc1961543b9a3433466bc8c79a2f4ca75b5Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 6e4710d7d8782cb61af29a7e7111ddfc38b9e1a3Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 2ad56e434199ca24a812bb353667aa1c3860f513Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before cc3c0399361efaaf7ae64262eb3f70829b1189c6Affected
00cfd77b9063dcdf3628a7087faba60de85a9cc8 to before 5cd6e0ad79d2615264f63929f8b457ad97ae550dAffected

LinuxLinux

5.10Affected
before 5.10Not affected
5.10.259 through 5.10.*Not affected
5.15.210 through 5.15.*Not affected
6.1.176 through 6.1.*Not affected
6.6.141 through 6.6.*Not affected
6.12.91 through 6.12.*Not affected
6.18.30 through 6.18.*Not affected
7.0.7 through 7.0.*Not affected
7.1 and laterNot affected

References

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