CVE-2022-49919 netfilter: nf_tables: release flow rule object from commit path
A use-after-free vulnerability in the Linux kernel netfilter subsystem allows local attackers to potentially execute code or escalate privileges via race conditions.
- 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-2022-49919?
CVE-2022-49919 is a high-severity use after free vulnerability in Linux kernel, published on 1 May 2025. 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:
netfilter: nf_tables: release flow rule object from commit path
No need to postpone this to the commit release path, since no packets are walking over this object, this is accessed from control plane only. This helped uncovered UAF triggered by races with the netlink notifier.
Which versions are affected by CVE-2022-49919?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49919?
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-2022-49919 being exploited?
There is no known exploitation of CVE-2022-49919 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49919, GHSA-3mh8-97g4-p2mv, UBUNTU-CVE-2022-49919.