CVE-2026-23027 LoongArch: KVM: Fix kvm_device leak in kvm_pch_pic_destroy()
A memory leak in the Linux kernel's LoongArch KVM implementation allows local attackers to cause a denial of service by exhausting system memory.
- 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-2026-23027?
CVE-2026-23027 is a memory corruption vulnerability in Linux, published on 31 Jan 2026. 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: Fix kvm_device leak in kvm_pch_pic_destroy()
In kvm_ioctl_create_device(), kvm_device has allocated memory, kvm_device->destroy() seems to be supposed to free its kvm_device struct, but kvm_pch_pic_destroy() is not currently doing this, that would lead to a memory leak.
So, fix it.
Which versions are affected by CVE-2026-23027?
How do I fix CVE-2026-23027?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-23027 being exploited?
There is no known exploitation of CVE-2026-23027 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-23027, DEBIAN-CVE-2026-23027, GHSA-fg32-8vpm-2j63, ROOT-OS-UBUNTU-2204-CVE-2026-23027, ROOT-OS-UBUNTU-2404-CVE-2026-23027, UBUNTU-CVE-2026-23027.