CVE-2024-42281 bpf: Fix a segment issue when downgrading gso_size
A flaw in the Linux kernel BPF subsystem allows triggering a kernel crash via specific network packet segmentation, causing 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-2024-42281?
CVE-2024-42281 is a medium-severity denial of service vulnerability in Linux kernel, published on 17 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:
bpf: Fix a segment issue when downgrading gso_size
Linearize the skb when downgrading gso_size because it may trigger a BUG_ON() later when the skb is segmented as described in [1,2].
Which versions are affected by CVE-2024-42281?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42281?
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-2024-42281 being exploited?
There is no known exploitation of CVE-2024-42281 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-42281, DEBIAN-CVE-2024-42281, GHSA-4w6w-2c5p-xchq, UBUNTU-CVE-2024-42281.