GSD-2021-1000260 iommu/vt-d: Remove WO permissions on second-level paging entries
A flaw in the Linux Kernel IOMMU driver allowed write-only permissions on paging entries, potentially enabling privilege escalation or unauthorized data access.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000260?
GSD-2021-1000260 is a vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
iommu/vt-d: Remove WO permissions on second-level paging entries
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.12.4 by commit 66c24699f266ff310381a9552d3576eea8ad6e20, it was introduced in version v5.6 by commit b802d070a52a1565b47daaa808872cfbd4a17b01. For more details please see the references link.
Which versions are affected by GSD-2021-1000260?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000260?
No fix has been published for GSD-2021-1000260 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000260 being exploited?
There is no known exploitation of GSD-2021-1000260 in the wild and no public exploit code.