CVE-2021-47296 KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak
A memory leak in Linux kernel KVM PPC code can cause crashes and corruption when user copy operations fail, leading to denial of service.
- 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-2021-47296?
CVE-2021-47296 is a high-severity memory corruption vulnerability in Linux kernel, published on 21 May 2024. 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:
KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak
vcpu_put is not called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues.
Weakness: CWE-401
Which versions are affected by CVE-2021-47296?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47296?
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-2021-47296 being exploited?
There is no known exploitation of CVE-2021-47296 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47296, GHSA-28c9-mq9x-7pcr, UBUNTU-CVE-2021-47296.