CVE-2026-72064

Summary

In the Linux kernel, the following vulnerability has been resolved:

net: mana: Sync page pool RX frags for CPU

MANA allocates RX buffers from page pool fragments when frag_count is greater than 1. In that case the buffers remain DMA mapped by page pool and the RX completion path does not call dma_unmap_single(). As a result, the implicit sync-for-CPU normally performed by dma_unmap_single() is missing before the packet data is passed to the networking stack.

This breaks RX on configurations which require explicit DMA syncing, for example when booted with swiotlb=force.

Fix this by recording the page pool page and DMA sync offset when the RX buffer is allocated, and syncing the received packet range for CPU access before handing the RX buffer to the stack.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux730ff06d3f5cc2ce0348414b78c10528b767d4a3 < bc650dd5ce6434286b96e2b26a41af81f679cc7caffected
LinuxLinux730ff06d3f5cc2ce0348414b78c10528b767d4a3 < c72a0f09c57f92113df69f9b902d11c9e4b132f5affected
LinuxLinux6.18affected
LinuxLinux0 < 6.18unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References