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CVE-2026-53216

9.8 · CRITICAL

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…

Published Jun 25, 2026EPSS 0.50%

Overview

CVE-2026-53216 is a critical-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eecRefgit.kernel.org/stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3eRefgit.kernel.org/stable/c/9545cc5ef18ca22d031f2f47c157192460652359Refgit.kernel.org/stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749Refgit.kernel.org/stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1Refgit.kernel.org/stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339Refgit.kernel.org/stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53216?

CVE-2026-53216 is a critical-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-53216?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-53216?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53216?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53216 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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