GSD-2021-1001082 x86/fpu: Prevent state corruption in __fpu__restore_sig()
A local attacker can exploit state corruption in the x86 FPU restore function to potentially escalate privileges or cause a system crash.
- 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-2021-1001082?
GSD-2021-1001082 is a memory corruption 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
x86/fpu: Prevent state corruption in __fpu__restore_sig()
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 v5.12.13 by commit ec25ea1f3f05d6f8ee51d1277efea986eafd4f2a, it was introduced in version v5.8 by commit b860eb8dce5906b14e3a7f3c771e0b3d6ef61b94. For more details please see the references link.
Which versions are affected by GSD-2021-1001082?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001082?
No fix has been published for GSD-2021-1001082 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-2021-1001082 being exploited?
There is no known exploitation of GSD-2021-1001082 in the wild and no public exploit code.