GSD-2021-1000763 efi/libstub: prevent read overflow in find_file_option()
A read overflow in the Linux Kernel EFI stub allows attackers to cause denial of service or disclose sensitive memory contents.
- 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-2021-1000763?
GSD-2021-1000763 is a memory corruption vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
efi/libstub: prevent read overflow in find_file_option()
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 v5.10.43 by commit 951f8ef71d691f754483cc9d871cb493379fdb35, it was introduced in version v5.8 by commit 7a88a6227dc7f2e723bba11ece05e57bd8dce8e4. For more details please see the references link.
Which versions are affected by GSD-2021-1000763?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000763?
No fix has been published for GSD-2021-1000763 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-2021-1000763 being exploited?
There is no known exploitation of GSD-2021-1000763 in the wild and no public exploit code.