GSD-2021-1001381 dma-buf/sync_file: Don't leak fences on merge failure
A local attacker can cause a memory leak in the Linux kernel's dma-buf subsystem by triggering a fence merge failure, potentially leading to resource exhaustion.
- 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-2021-1001381?
GSD-2021-1001381 is a memory corruption vulnerability in Kernel, published on 3 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
dma-buf/sync_file: Don't leak fences on merge failure
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 v4.19.199 by commit e0355a0ad31a1d677b2a4514206de4902bd550e8, it was introduced in version v4.9 by commit a02b9dc90d844cc7df7b63264e7920cc425052d9. For more details please see the references link.
Which versions are affected by GSD-2021-1001381?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001381?
No fix has been published for GSD-2021-1001381 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-2021-1001381 being exploited?
There is no known exploitation of GSD-2021-1001381 in the wild and no public exploit code.