CVE-2024-45819 libxl leaks data to PVH guests via ACPI tables
A local attacker with PVH guest access can read uninitialized memory from the host via ACPI tables, potentially exposing sensitive data.
- 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-2024-45819?
CVE-2024-45819 is a medium-severity vulnerability in Xen Xen, published on 19 Dec 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
PVH guests have their ACPI tables constructed by the toolstack. The construction involves building the tables in local memory, which are then copied into guest memory. While actually used parts of the local memory are filled in correctly, excess space that is being allocated is left with its prior contents.
Weakness: CWE-276
Which versions are affected by CVE-2024-45819?
It affects 1 product.
Products include Xen Xen.
How do I fix CVE-2024-45819?
Apply the vendor's patch.
Is CVE-2024-45819 being exploited?
There is no known exploitation of CVE-2024-45819 in the wild and no public exploit code.
Other vulnerabilities in Xen Xen
Sources
Also known as ALPINE-CVE-2024-45819, DEBIAN-CVE-2024-45819, GHSA-4rgq-6973-6xxh, UBUNTU-CVE-2024-45819.