GSD-2021-1002164 KVM: arm64: Fix host stage-2 PGD refcount
A refcount error in KVM arm64 stage-2 page tables may allow local attackers to cause memory corruption, leading to privilege escalation or system crashes.
- 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-2021-1002164?
GSD-2021-1002164 is a memory corruption vulnerability in Kernel, published on 14 Nov 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 v5.15 by commit 1d58a17ef54599506d44c45ac95be27273a4d2b1, it was introduced in version v5.13 by commit 1025c8c0c6accfcbdc8f52ca1940160f65cd87d6. For more details please see the references link.
Which versions are affected by GSD-2021-1002164?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002164?
No fix has been published for GSD-2021-1002164 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-2021-1002164 being exploited?
There is no known exploitation of GSD-2021-1002164 in the wild and no public exploit code.