GSD-2022-1004374 x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported
The Linux kernel incorrectly enabled IBPB-on-entry on unsupported hardware, potentially bypassing Spectre mitigations and allowing side-channel attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1004374?
GSD-2022-1004374 is a vulnerability in Kernel, published on 31 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
x86/bugs: Do not enable IBPB-on-entry when IBPB is not supported
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 v5.15.57 by commit 3653093b7bbfa8c8c61858bffdc7f1e41ad436e1, it was introduced in version v5.15.57 by commit fd17a4254965fc44044b3d7f5be186880ed7a021. For more details please see the references link.
Which versions are affected by GSD-2022-1004374?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1004374?
No fix has been published for GSD-2022-1004374 yet. Limit exposure of the affected software until one is available.
Is GSD-2022-1004374 being exploited?
There is no known exploitation of GSD-2022-1004374 in the wild and no public exploit code.