GSD-2021-1001007 net: bridge: fix vlan tunnel dst refcnt when egressing
A reference counting error in the Linux kernel bridge VLAN tunnel egress path can lead to use-after-free, potentially causing crashes or code execution.
- 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-2021-1001007?
GSD-2021-1001007 is an use after free 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
net: bridge: fix vlan tunnel dst refcnt when egressing
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 v5.10.46 by commit fc7fdd8c5c2ad2fe3e297698be9d4dbe4a4e0579, it was introduced in version v4.11 by commit 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd. For more details please see the references link.
Which versions are affected by GSD-2021-1001007?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001007?
No fix has been published for GSD-2021-1001007 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1001007 being exploited?
There is no known exploitation of GSD-2021-1001007 in the wild and no public exploit code.