GSD-2021-1000506 ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
A use-after-free vulnerability in Linux kernel IPC mechanisms allows local attackers to potentially escalate privileges or execute code.
- 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-2021-1000506?
GSD-2021-1000506 is an use after free 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
ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry
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 v5.10.40 by commit 4528c0c323085e645b8765913b4a7fd42cf49b65, it was introduced in version v5.6 by commit c5b2cbdbdac563f46ecd5e187253ab1abbd6fc04. For more details please see the references link.
Which versions are affected by GSD-2021-1000506?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000506?
No fix has been published for GSD-2021-1000506 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-2021-1000506 being exploited?
There is no known exploitation of GSD-2021-1000506 in the wild and no public exploit code.