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Vulnerability record · CVE-2026-53216 · published 25 June 2026

CVE-2026-53216: Linux kernel vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.74% · top 47.3%
9.8CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
2 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eec Patch
https://git.kernel.org/stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3e Patch
https://git.kernel.org/stable/c/9545cc5ef18ca22d031f2f47c157192460652359 Patch
https://git.kernel.org/stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749 Patch
https://git.kernel.org/stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1 Patch
https://git.kernel.org/stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339 Patch
https://git.kernel.org/stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305a Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53216), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.