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.

Classification

CVE ID: CVE-2025-37849

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.03% (probability of being exploited)

EPSS Percentile: 7.64% (scored less or equal to compared to others)

EPSS Date: 2025-06-07 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-37849
https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e
https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5
https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73
https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52
https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299
https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672

Timeline