GSD-2021-1001084 powerpc/perf: Fix crash in perf_instruction_pointer() when ppmu is not set
A null pointer dereference in the Linux kernel's powerpc performance monitoring code can cause a system crash, requiring local access to exploit.
- 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-2021-1001084?
GSD-2021-1001084 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
powerpc/perf: Fix crash in perf_instruction_pointer() when ppmu is not set
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 74c3c34a04bc226f77b9e515aa067072cff44e52, it was introduced in version v5.11 by commit 2ca13a4cc56c920a6c9fc8ee45d02bccacd7f46c. For more details please see the references link.
Which versions are affected by GSD-2021-1001084?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001084?
No fix has been published for GSD-2021-1001084 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1001084 being exploited?
There is no known exploitation of GSD-2021-1001084 in the wild and no public exploit code.