GSD-2023-1000978 fbdev: fbcon: release buffer when fbcon_do_set_font() failed
A memory leak in the Linux kernel's fbcon driver can lead to resource exhaustion and denial of service when font setting fails.
- 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-2023-1000978?
GSD-2023-1000978 is a memory corruption vulnerability in Kernel, published on 17 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
fbdev: fbcon: release buffer when fbcon_do_set_font() failed
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 v5.15.86 by commit 88ec6d11052da527eb9268831e7a9bc5bbad02f6, it was introduced in version v5.15.64 by commit ebd6f886aa2447fcfcdce5450c9e1028e1d681bb. For more details please see the references link.
Which versions are affected by GSD-2023-1000978?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1000978?
No fix has been published for GSD-2023-1000978 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-2023-1000978 being exploited?
There is no known exploitation of GSD-2023-1000978 in the wild and no public exploit code.