GSD-2021-1002258 x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
A NULL pointer dereference in the Linux kernel Hyper-V driver can cause a system crash if Hyper-V setup fails.
- 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-2021-1002258?
GSD-2021-1002258 is a vulnerability in Kernel, published on 29 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
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 v5.4.162 by commit b0e44dfb4e4c699cca33ede431b8d127e6e8d661, it was introduced in version v4.16 by commit 93286261de1b46339aa27cd4c639b21778f6cade. For more details please see the references link.
Which versions are affected by GSD-2021-1002258?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002258?
No fix has been published for GSD-2021-1002258 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1002258 being exploited?
There is no known exploitation of GSD-2021-1002258 in the wild and no public exploit code.