CVE-2023-53432 firewire: net: fix use after free in fwnet_finish_incoming_packet()
A use-after-free vulnerability in the Linux kernel's firewire network driver allows attackers to cause denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53432?
CVE-2023-53432 is a high-severity use after free vulnerability in Linux kernel, published on 18 Sep 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:
firewire: net: fix use after free in fwnet_finish_incoming_packet()
The netif_rx() function frees the skb so we can't dereference it to save the skb->len.
Weakness: CWE-416
Which versions are affected by CVE-2023-53432?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53432?
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-2023-53432 being exploited?
There is no known exploitation of CVE-2023-53432 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53432, DEBIAN-CVE-2023-53432, GHSA-vgfh-vgxv-c838, ROOT-OS-DEBIAN-11-CVE-2023-53432, UBUNTU-CVE-2023-53432.