CVE-2021-47600 dm btree remove: fix use after free in rebalance_children()
A use-after-free flaw in the Linux kernel's device-mapper btree removal allows attackers to potentially execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-47600?
CVE-2021-47600 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
dm btree remove: fix use after free in rebalance_children()
Move dm_tm_unlock() after dm_tm_dec().
Weakness: CWE-416
Which versions are affected by CVE-2021-47600?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2021-47600?
Apply the vendor's patch.
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 CVE-2021-47600 being exploited?
There is no known exploitation of CVE-2021-47600 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2021-47600, GHSA-gr6r-fxgm-72rq, UBUNTU-CVE-2021-47600.