CVE-2019-19332 Memory corruption in Kernel
A local attacker with access to /dev/kvm can trigger an out-of-bounds write in the KVM hypervisor, causing a system crash and 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-2019-19332?
CVE-2019-19332 is a medium-severity memory corruption vulnerability in Linux kernel, published on 9 Jan 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An out-of-bounds memory write issue was found in the Linux Kernel, version 3.13 through 5.4, in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulting in a denial of service.
Weakness: CWE-787
Which versions are affected by CVE-2019-19332?
It affects 2 products.
Products include Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2019-19332?
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-2019-19332 being exploited?
There is no known exploitation of CVE-2019-19332 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2019-19332, GHSA-v6jm-gf32-wr3v, MGASA-2019-0388, UBUNTU-CVE-2019-19332.