Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
9.8
CVE-2026-53216: Linux Kernel: XDP Frame Size Limitation Fixes Data Corruption
CVE-2026-53216
Summary
A vulnerability in the Linux kernel's network driver for the mvpp2 chip has been fixed. This issue could cause data corruption or system crashes when handling packets. The fix ensures that the size of XDP buffers is limited to the actual buffer size, preventing memory corruption.
Original title
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...
Original 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.
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.
- https://git.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eec
- https://git.kernel.org/stable/c/910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3e
- https://git.kernel.org/stable/c/9545cc5ef18ca22d031f2f47c157192460652359
- https://git.kernel.org/stable/c/994bd2b58d2bd08aa97ec0836cc813cfcb00d749
- https://git.kernel.org/stable/c/a3ee9231ccec6ec3be2de89c56f897055fd9eab1
- https://git.kernel.org/stable/c/ec8e1e5842bc0dbd4c272761f4db3651eecd0339
- https://git.kernel.org/stable/c/f3c6aa078927e6fe8121c9c591ddee8716c5305a
Published: 25 Jun 2026 · Updated: 23 Jul 2026 · First seen: 25 Jun 2026