CVE-2023-53535 net: bcmgenet: Add a check for oversized packets
A missing check for oversized packets in the Broadcom GENET network driver can cause a kernel panic, leading to denial of service.
- 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-2023-53535?
CVE-2023-53535 is a high-severity denial of service vulnerability in Linux kernel, published on 4 Oct 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:
net: bcmgenet: Add a check for oversized packets
Occasionnaly we may get oversized packets from the hardware which exceed the nomimal 2KiB buffer size we allocate SKBs with. Add an early check which drops the packet to avoid invoking skb_over_panic() and move on to processing the next packet.
Which versions are affected by CVE-2023-53535?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53535?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-53535 being exploited?
There is no known exploitation of CVE-2023-53535 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53535, DEBIAN-CVE-2023-53535, GHSA-wh7j-wv38-gcf6, UBUNTU-CVE-2023-53535.