CVE-2023-0881 DDoS in Ubuntu package linux-bluefield
Remote attackers can crash the system by sending DDoS traffic to TCP port 22 due to a kernel bug in the linux-bluefield package.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-0881?
CVE-2023-0881 is a high-severity denial of service vulnerability in Ubuntu package linux-bluefield, published on 31 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Running DDoS on tcp port 22 will trigger a kernel crash. This issue is introduced by the backport of a commit regarding nft_lookup without the subsequent fixes that were introduced after this commit. The resolution of this CVE introduces those commits to the linux-bluefield package.
Which versions are affected by CVE-2023-0881?
It affects 1 product.
Products include Canonical Linux-Bluefield.
How do I fix CVE-2023-0881?
No fix has been published for CVE-2023-0881 yet. Limit exposure of the affected software until one is available.
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-2023-0881 being exploited?
There is no known exploitation of CVE-2023-0881 in the wild and no public exploit code.
Sources
Also known as GHSA-wrxc-qw43-c96x, UBUNTU-CVE-2023-0881.