CVE-2022-48911 netfilter: nf_queue: fix possible use-after-free
A use-after-free vulnerability in the Linux kernel netfilter nf_queue allows attackers to potentially execute code or cause a denial of service.
- 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-2022-48911?
CVE-2022-48911 is a high-severity use after free vulnerability in Linux kernel, published on 22 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:
netfilter: nf_queue: fix possible use-after-free
Eric Dumazet says: The sock_hold() side seems suspect, because there is no guarantee that sk_refcnt is not already 0.
On failure, we cannot queue the packet and need to indicate an error. The packet will be dropped by the caller.
v2: split skb prefetch hunk into separate change
Weakness: CWE-416
Which versions are affected by CVE-2022-48911?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-48911?
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-2022-48911 being exploited?
There is no known exploitation of CVE-2022-48911 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-48911, GHSA-7vcc-f42v-gv2x, UBUNTU-CVE-2022-48911.