CVE-2025-37849
Published: May 10, 2025Last modified: May 10, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.140-r0) |
| 25 LTS | linux-lts | Fixed (6.12.41-r0) | |
| Stream | linux-lts | Fixed (6.12.41-r0) |
References
- https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e
- https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52
- https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672
- https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5
- https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73
- https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html