GSD-2021-1002651 dm btree remove: fix use after free in rebalance_children()
A use-after-free flaw in the Linux kernel device-mapper btree removal allows local attackers to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1002651?
GSD-2021-1002651 is an use after free vulnerability in Kernel, published on 27 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
dm btree remove: fix use after free in rebalance_children()
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 v4.19.222 by commit 293f957be5e39720778fb1851ced7f5fba6d51c3. For more details please see the references link.
Which versions are affected by GSD-2021-1002651?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002651?
No fix has been published for GSD-2021-1002651 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-2021-1002651 being exploited?
There is no known exploitation of GSD-2021-1002651 in the wild and no public exploit code.