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Review reviewHigh

CVE-2025-37849

Linux Linux, linux kernel, debian linux

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.

CVSS
7.8
EPSS
0.26%
17.4% percentile
CISA KEV
Not listed
Published
2025.05.09
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.26%
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel, debian linux
Affected versions
>= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < 07476e0d932afc53c05468076393ac35d0b4999e, >= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < 5085e02362b9948f82fceca979b8f8e12acb1cc5, >= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < c322789613407647a05ff5c451a7bf545fb34e73, >= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < 2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52, >= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < f1e9087abaeedec9bf2894a282ee4f0d8383f299, >= 6211753fdfd05af9e08f54c8d0ba3ee516034878 < 250f25367b58d8c65a1b060a2dda037eea09a672, >= 3.11, < 6.1.135, >= 6.2 < 6.6.88, >= 6.7 < 6.12.24, >= 6.13 < 6.13.12, >= 6.14 < 6.14.3, 11.0
Fixed versions
6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel, debian linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416