CVE-2025-37849

KVM: arm64: Tear down vGIC on failed vCPU creation

State: Published
Severity: 8.8 High
Published: May 9, 2025
Updated: Aug 5, 2026
Reserved: Apr 16, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 07476e0d932afc53c05468076393ac35d0b4999eAffected 6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 5085e02362b9948f82fceca979b8f8e12acb1cc5Affected 6211753fdfd05af9e08f54c8d0ba3ee516034878 to before c322789613407647a05ff5c451a7bf545fb34e73Affected 6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52Affected 6211753fdfd05af9e08f54c8d0ba3ee516034878 to before f1e9087abaeedec9bf2894a282ee4f0d8383f299Affected 6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 250f25367b58d8c65a1b060a2dda037eea09a672Affected
LinuxLinux	3.11Affected before 3.11Not affected 6.1.135 through 6.1.Not affected 6.6.88 through 6.6.Not affected 6.12.24 through 6.12.Not affected 6.13.12 through 6.13.Not affected 6.14.3 through 6.14.*Not affected 6.15 and laterNot affected

Product

Versions

LinuxLinux

6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 07476e0d932afc53c05468076393ac35d0b4999eAffected
6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 5085e02362b9948f82fceca979b8f8e12acb1cc5Affected
6211753fdfd05af9e08f54c8d0ba3ee516034878 to before c322789613407647a05ff5c451a7bf545fb34e73Affected
6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52Affected
6211753fdfd05af9e08f54c8d0ba3ee516034878 to before f1e9087abaeedec9bf2894a282ee4f0d8383f299Affected
6211753fdfd05af9e08f54c8d0ba3ee516034878 to before 250f25367b58d8c65a1b060a2dda037eea09a672Affected

LinuxLinux

3.11Affected
before 3.11Not affected
6.1.135 through 6.1.*Not affected
6.6.88 through 6.6.*Not affected
6.12.24 through 6.12.*Not affected
6.13.12 through 6.13.*Not affected
6.14.3 through 6.14.*Not affected
6.15 and laterNot affected

References

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