CVE-2024-43888 mm: list_lru: fix UAF for memory cgroup
A use-after-free vulnerability in the Linux kernel's list_lru subsystem allows attackers to potentially execute arbitrary 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-2024-43888?
CVE-2024-43888 is a high-severity use after free vulnerability in Linux kernel, published on 26 Aug 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:
mm: list_lru: fix UAF for memory cgroup
The mem_cgroup_from_slab_obj() is supposed to be called under rcu lock or cgroup_mutex or others which could prevent returned memcg from being freed. Fix it by adding missing rcu read lock.
Found by code inspection.
[[email protected]: only grab rcu lock when necessary, per Vlastimil]
Weakness: CWE-416
Which versions are affected by CVE-2024-43888?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-43888?
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-2024-43888 being exploited?
There is no known exploitation of CVE-2024-43888 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-43888, DEBIAN-CVE-2024-43888, GHSA-wm87-x2vw-r6ch, UBUNTU-CVE-2024-43888.