What is CVE-2025-37849?

CVE-2025-37849 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 3.11 onward and patched in 6.1.135, 6.6.88, 6.12.24 and others. CVE-2025-37849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37849?

CVE-2025-37849 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-2025-37849?

Yes, CVE-2025-37849 has been patched. Fixed versions include 6.1.135, 6.6.88, 6.12.24 and others. If you are running Linux kernel 3.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37849 actively exploited?

CVE-2025-37849 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-2025-37849

High

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Tear down vGIC on failed vCPU creation If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor, we propagate the error back to the ioctl but leave the vGIC vCPU data initialised. Note only does this leak the corresponding memory when the vCPU is destroyed but it can also lead to use-after-free if the redistributor device handling tries to walk into the vCPU. Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the vGIC vCPU structures are destroyed on error.

Package Linux Kernel

Published 2025-05-09

Last modified 2025-11-17

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-2025-37849 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 3.11 and later are affected. Fixed in 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3, 6.15 and their respective stable series.

Affected from

≥ 3.11

Fixed in

✓ 6.1.135 6.1.x ✓ 6.6.88 6.6.x ✓ 6.12.24 6.12.x ✓ 6.13.12 6.13.x ✓ 6.14.3 6.14.x ✓ 6.15

References

7 total

Kernel Git
https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e

Patch
Kernel Git
https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52

Patch
Kernel Git
https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672

Patch
Kernel Git
https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5

Patch
Kernel Git
https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2025-37849

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-05-09

Modified 2025-11-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37849?

CVE-2025-37849 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 3.11 onward and has been patched in 6.1.135, 6.6.88, 6.12.24 and others. CVE-2025-37849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37849?

CVE-2025-37849 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-2025-37849?

Yes. CVE-2025-37849 has been patched. Fixed versions include 6.1.135, 6.6.88, 6.12.24 and others. If you are running Linux kernel 3.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37849 actively exploited?

No. CVE-2025-37849 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.