What is CVE-2026-46137?

CVE-2026-46137 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 6.6.141, 6.12.91, 6.18.30 and others. CVE-2026-46137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46137?

CVE-2026-46137 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46137?

Yes, CVE-2026-46137 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.30 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46137 actively exploited?

CVE-2026-46137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46137

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 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.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-05-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 6.6.141, 6.12.91, 6.18.30, 7.0.7, 7.1-rc3 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 6.6.141 6.6.x ✓ 6.12.91 6.12.x ✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1-rc3

References

The following references provide additional information about CVE-2026-46137 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/013dcdc1961543b9a3433466bc8c79a2f4ca75b5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2ad56e434199ca24a812bb353667aa1c3860f513
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5cd6e0ad79d2615264f63929f8b457ad97ae550d
Patch

5 patch commits total View all on NVD

Details

CVE ID CVE-2026-46137

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-05-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46137?

CVE-2026-46137 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 6.6.141, 6.12.91, 6.18.30 and others. CVE-2026-46137 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46137?

CVE-2026-46137 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-46137?

Yes — CVE-2026-46137 has been patched. Fixed versions include 6.6.141, 6.12.91, 6.18.30 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46137 actively exploited?

No — CVE-2026-46137 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.