GSD-2021-1000928 can: j1939: fix Use-after-Free, hold skb ref while in use
A use-after-free vulnerability in the Linux kernel J1939 CAN protocol allows local attackers to potentially execute code or cause a system crash.
- 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-2021-1000928?
GSD-2021-1000928 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
can: j1939: fix Use-after-Free, hold skb ref while in use
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 v5.4.128 by commit 22cba878abf646cd3a02ee7c8c2cef7afe66a256, it was introduced in version v5.4 by commit 9d71dd0c70099914fcd063135da3c580865e924c. For more details please see the references link.
Which versions are affected by GSD-2021-1000928?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000928?
No fix has been published for GSD-2021-1000928 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-2021-1000928 being exploited?
There is no known exploitation of GSD-2021-1000928 in the wild and no public exploit code.