CVE-2026-53216

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < a3ee9231ccec6ec3be2de89c56f897055fd9eab1affected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < ec8e1e5842bc0dbd4c272761f4db3651eecd0339affected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < 3b8b0c3631b19faee53f0d15a49924129b063eecaffected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < 994bd2b58d2bd08aa97ec0836cc813cfcb00d749affected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < 910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3eaffected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < 9545cc5ef18ca22d031f2f47c157192460652359affected
LinuxLinux07dd0a7aae7f72af7cec18909581c2bb570edddc < f3c6aa078927e6fe8121c9c591ddee8716c5305aaffected
LinuxLinux5.9affected
LinuxLinux0 < 5.9unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.94 <= 6.12.*unaffected
LinuxLinux6.18.36 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References