GSD-2021-1001894 KVM: arm64: Fix host stage-2 PGD refcount
A refcounting error in KVM arm64 stage-2 page tables can lead to memory corruption, potentially allowing privilege escalation or denial of service.
- 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-2021-1001894?
GSD-2021-1001894 is a memory corruption vulnerability in Kernel, published on 28 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: arm64: Fix host stage-2 PGD refcount
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 v5.14.15 by commit b372264c66ef78f2cab44e877fbd765ad6d24c39, it was introduced in version v5.13 by commit 1025c8c0c6accfcbdc8f52ca1940160f65cd87d6. For more details please see the references link.
Which versions are affected by GSD-2021-1001894?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001894?
No fix has been published for GSD-2021-1001894 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2021-1001894 being exploited?
There is no known exploitation of GSD-2021-1001894 in the wild and no public exploit code.