CVE-2026-53031 bpf: Validate node_id in arena_alloc_pages()
Missing validation of node_id in BPF arena allocation can lead to kernel instability or crashes, requiring a kernel patch.
- 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-2026-53031?
CVE-2026-53031 is a high-severity vulnerability in Linux kernel, published on 24 Jun 2026. 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: Validate node_id in arena_alloc_pages()
arena_alloc_pages() accepts a plain int node_id and forwards it through the entire allocation chain without any bounds checking.
Validate node_id before passing it down the allocation chain in arena_alloc_pages().
Weakness: CWE-20
Which versions are affected by CVE-2026-53031?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53031?
Apply the vendor's patch.
Is CVE-2026-53031 being exploited?
There is no known exploitation of CVE-2026-53031 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53031, DEBIAN-CVE-2026-53031, GHSA-qf6r-crjw-4c6m, UBUNTU-CVE-2026-53031.