GSD-2021-1000425 powerpc/64s: Fix pte update for kernel memory on radix
A flaw in Linux kernel powerpc/64s radix page table updates allows local attackers to corrupt kernel memory, potentially leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000425?
GSD-2021-1000425 is a memory corruption vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
powerpc/64s: Fix pte update for kernel memory on radix
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 v5.4.119 by commit 73f9dccb29e4f82574bec2765c0090cdb0404301, it was introduced in version v4.18 by commit f1cb8f9beba8699dd1b4518418191499e53f7b17. For more details please see the references link.
Which versions are affected by GSD-2021-1000425?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000425?
No fix has been published for GSD-2021-1000425 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-2021-1000425 being exploited?
There is no known exploitation of GSD-2021-1000425 in the wild and no public exploit code.