CVE-2020-12768 Denial of service in n/a
A memory leak in the Linux kernel's SVM initialization can lead to resource exhaustion, though the impact is disputed as negligible and non-triggerable.
- 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-2020-12768?
CVE-2020-12768 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 9 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in the Linux kernel before 5.6. svm_cpu_uninit in arch/x86/kvm/svm.c has a memory leak, aka CID-d80b64ff297e. NOTE: third parties dispute this issue because it's a one-time leak at the boot, the size is negligible, and it can't be triggered at will
Weakness: CWE-401
Which versions are affected by CVE-2020-12768?
It affects 3 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2020-12768?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-12768 being exploited?
There is no known exploitation of CVE-2020-12768 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-12768, GHSA-8gmw-3fcx-gm64, UBUNTU-CVE-2020-12768.