What is CVE-2026-53180?

CVE-2026-53180 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 6.9 onward and patched in 6.12.94, 6.18.36, 7.0.13 and others. CVE-2026-53180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53180?

CVE-2026-53180 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-53180?

Yes, CVE-2026-53180 has been patched. Fixed versions include 6.12.94, 6.18.36, 7.0.13 and others. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53180 actively exploited?

CVE-2026-53180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2026-53180

High

In the Linux kernel, the following vulnerability has been resolved: timers/migration: Fix livelock in tmigr_handle_remote_up() tmigr_handle_remote_cpu() skips timer_expire_remote() when cpu == smp_processor_id(), assuming the local softirq path already handled this CPU's timers. This assumption is wrong because jiffies can advance after the handling of the CPU's global timers in run_timer_base(BASE_GLOBAL) and before tmigr_handle_remote() evaluates the expiry times. As a consequence a timer which expires after the CPU local timer wheel advanced and becomes expired in the remote handling is ignored and the callback is never invoked and removed from the timer wheel. What's worse is that fetch_next_timer_interrupt_remote() keeps reporting it as expired, and the event is re-queued with expires == now on each iteration. The goto-again loop spins indefinitely. Fix this by calling timer_expire_remote() unconditionally. That's minimal overhead for the common case as __run_timer_base() returns immediately if there is nothing to expire in the local wheel. [ tglx: Amend change log and add a comment ]

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-667

CVE-2026-53180 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.12.94, 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.12.94 6.12.x ✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/07b3b83587fb3012619f4439389b64a955fc7836

Patch
Kernel Git
https://git.kernel.org/stable/c/1d6c2062b77be09ec15d6bf637b2e2221c4482fc

Patch
Kernel Git
https://git.kernel.org/stable/c/d338e61ea94052a786aac9f58e9f0d8520afa0fd

Patch
Kernel Git
https://git.kernel.org/stable/c/d486b4934a8e504376b85cdb3766f306d57aff5b

Patch

Details

CVE ID CVE-2026-53180

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53180?

CVE-2026-53180 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.94, 6.18.36, 7.0.13 and others. CVE-2026-53180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53180?

CVE-2026-53180 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-53180?

Yes. CVE-2026-53180 has been patched. Fixed versions include 6.12.94, 6.18.36, 7.0.13 and others. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53180 actively exploited?

No. CVE-2026-53180 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.