CVE-2025-38366 LoongArch: KVM: Check validity of "num_cpu" from user space
A missing validation of the CPU count in LoongArch KVM allows an array pointer overflow, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38366?
CVE-2025-38366 is a high-severity vulnerability in Linux kernel, published on 25 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
LoongArch: KVM: Check validity of "num_cpu" from user space
The maximum supported cpu number is EIOINTC_ROUTE_MAX_VCPUS about irqchip EIOINTC, here add validation about cpu number to avoid array pointer overflow.
Which versions are affected by CVE-2025-38366?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38366?
Apply the vendor's patch.
Is CVE-2025-38366 being exploited?
There is no known exploitation of CVE-2025-38366 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-38366, GHSA-vj8j-2cq7-gxhm, UBUNTU-CVE-2025-38366.