CVE-2026-53216 net: mvpp2: limit XDP frame size to the RX buffer
A flaw in the Linux kernel mvpp2 driver allows memory corruption via XDP tail adjustment, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53216?
CVE-2026-53216 is a critical memory corruption vulnerability in Linux kernel, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: mvpp2: limit XDP frame size to the RX buffer
mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with PAGE_SIZE as frame size.
XDP helpers use frame_sz to validate tail growth and to derive the hard end of the data area. Advertising PAGE_SIZE for short buffers can let bpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting memory or later tripping skb tailroom checks.
Initialize the XDP buffer with bm_pool->frag_size so XDP tailroom matches the actual buffer backing the packet.
Which versions are affected by CVE-2026-53216?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53216?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-53216 being exploited?
There is no known exploitation of CVE-2026-53216 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53216, DEBIAN-CVE-2026-53216, GHSA-8vc2-h54q-6258, ROOT-OS-DEBIAN-11-CVE-2026-53216, ROOT-OS-DEBIAN-12-CVE-2026-53216, ROOT-OS-UBUNTU-2204-CVE-2026-53216 and 2 more.