GSD-2021-1000843 kvm: avoid speculation-based attacks from out-of-range memslot accesses
A local attacker can exploit speculative execution flaws in KVM memory slot handling to read sensitive kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000843?
GSD-2021-1000843 is a vulnerability in Kernel, published on 30 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
kvm: avoid speculation-based attacks from out-of-range memslot accesses
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 v4.9.273 by commit 740621309b25bbf619b8a0ba5fd50a8e58989441. For more details please see the references link.
Which versions are affected by GSD-2021-1000843?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000843?
No fix has been published for GSD-2021-1000843 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000843 being exploited?
There is no known exploitation of GSD-2021-1000843 in the wild and no public exploit code.