What is CVE-2025-37885?

CVE-2025-37885 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.4 onward and patched in 5.10.237, 5.15.181, 6.1.136 and others. CVE-2025-37885 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37885?

CVE-2025-37885 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2025-37885?

Yes, CVE-2025-37885 has been patched. Fixed versions include 5.10.237, 5.15.181, 6.1.136 and others. If you are running Linux kernel 4.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37885 actively exploited?

CVE-2025-37885 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2025-37885

High

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Reset IRTE to host control if *new* route isn't postable Restore an IRTE back to host control (remapped or posted MSI mode) if the *new* GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU. The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.

Package Linux Kernel

Published 2025-05-09

Last modified 2025-11-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2025-37885 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.4 and later are affected. Fixed in 5.10.237, 5.15.181, 6.1.136, 6.6.89, 6.12.26, 6.14.5, 6.15 and their respective stable series.

Affected from

≥ 4.4

Fixed in

✓ 5.10.237 5.10.x ✓ 5.15.181 5.15.x ✓ 6.1.136 6.1.x ✓ 6.6.89 6.6.x ✓ 6.12.26 6.12.x ✓ 6.14.5 6.14.x ✓ 6.15

References

9 total

Kernel Git
https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41

Patch
Kernel Git
https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b

Patch
Kernel Git
https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308db

Patch
Kernel Git
https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30

Patch
Kernel Git
https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2

Patch

Showing 5 of 9 references View all on NVD

Details

CVE ID CVE-2025-37885

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-05-09

Modified 2025-11-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37885?

CVE-2025-37885 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.4 onward and has been patched in 5.10.237, 5.15.181, 6.1.136 and others. CVE-2025-37885 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37885?

CVE-2025-37885 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2025-37885?

Yes. CVE-2025-37885 has been patched. Fixed versions include 5.10.237, 5.15.181, 6.1.136 and others. If you are running Linux kernel 4.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37885 actively exploited?

No. CVE-2025-37885 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.