CVE-2022-48904 iommu/amd: Fix I/O page table memory leak
A memory leak in the Linux kernel IOMMU driver can lead to resource exhaustion and denial of service when launching virtual machines with pass-through devices.
- 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-2022-48904?
CVE-2022-48904 is a medium-severity denial of service vulnerability in Linux kernel, published on 22 Aug 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:
iommu/amd: Fix I/O page table memory leak
The current logic updates the I/O page table mode for the domain before calling the logic to free memory used for the page table. This results in IOMMU page table memory leak, and can be observed when launching VM w/ pass-through devices.
Fix by freeing the memory used for page table before updating the mode.
Weakness: CWE-401
Which versions are affected by CVE-2022-48904?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48904?
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-2022-48904 being exploited?
There is no known exploitation of CVE-2022-48904 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48904, GHSA-qm4j-q6jh-qw3p, UBUNTU-CVE-2022-48904.