What is CVE-2026-46170?

CVE-2026-46170 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 6.6.142, 6.12.92, 6.18.30 and others. CVE-2026-46170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46170?

CVE-2026-46170 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-46170?

Yes, CVE-2026-46170 has been patched. Fixed versions include 6.6.142, 6.12.92, 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-2026-46170 actively exploited?

CVE-2026-46170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46170

Medium

In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: free sk if last When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(), and released at the end. If at that moment, it was the last reference being held, the sk would not be freed. sock_put() should then be called instead of __sock_put(). But that's not enough: if it is the last reference, sock_put() will call sk_free(), which will end up calling sk_stop_timer_sync() on the same timer, and waiting indefinitely to finish. So it is needed to mark that the timer is done at the end of the timer handler when it has not been rescheduled, not to call sk_stop_timer_sync() on "itself".

Package Linux Kernel

Published 2026-05-28

Last modified 2026-06-11

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 6.6.142, 6.12.92, 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 6.6.142 6.6.x ✓ 6.12.92 6.12.x ✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

5 total

Kernel Git
https://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a

Patch
Kernel Git
https://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3

Patch
Kernel Git
https://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb

Patch
Kernel Git
https://git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107

Patch
Kernel Git
https://git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed

Patch

Details

CVE ID CVE-2026-46170

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-06-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46170?

CVE-2026-46170 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 6.6.142, 6.12.92, 6.18.30 and others. CVE-2026-46170 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46170?

CVE-2026-46170 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-46170?

Yes. CVE-2026-46170 has been patched. Fixed versions include 6.6.142, 6.12.92, 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-2026-46170 actively exploited?

No. CVE-2026-46170 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.