CVE-2026-72064: net: mana: Sync page pool RX frags for CPU
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 fragcount is greater than 1. In that case the buffers remain DMA mapped by page pool and the RX completion path does not call dmaunmapsingle(). As a result, the implicit sync-for-CPU normally performed by dmaunmapsingle() 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
Event History
Frequently Asked Questions
What is the severity of CVE-2026-72064?
The severity of CVE-2026-72064 is rated at 27.
How do I fix CVE-2026-72064?
To address CVE-2026-72064, update your Linux kernel to the latest patched version that resolves this vulnerability.
What systems are affected by CVE-2026-72064?
CVE-2026-72064 affects the Linux kernel, specifically in the networking component handling MANA RX buffers.
What does CVE-2026-72064 exploit?
CVE-2026-72064 exploits a flaw in the synchronization of page pool RX fragments leading to potential DMA mapping issues.
When was CVE-2026-72064 published?
CVE-2026-72064 was published on August 15, 2026.