CVE-2026-53217 net: mvpp2: sync RX data at the hardware packet offset
An attacker on non-coherent DMA systems can read stale cache contents from the end of received network frames due to incorrect DMA synchronization in the mvpp2 driver.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53217?
CVE-2026-53217 is a high-severity vulnerability in Linux kernel, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: mvpp2: sync RX data at the hardware packet offset
mvpp2 programs the RX queue packet offset, so hardware writes received data at dma_addr + MVPP2_SKB_HEADROOM. The current CPU sync starts at dma_addr and only covers rx_bytes + MVPP2_MH_SIZE bytes, which syncs the unused headroom and misses the same number of bytes at the packet tail.
On non-coherent DMA systems this can leave the CPU reading stale cache contents for the end of the received frame.
Use dma_sync_single_range_for_cpu() with MVPP2_SKB_HEADROOM as the range offset so the sync covers the Marvell header and packet data actually written by hardware.
Weakness: CWE-682
Which versions are affected by CVE-2026-53217?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53217?
Apply the vendor's patch.
Is CVE-2026-53217 being exploited?
There is no known exploitation of CVE-2026-53217 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53217, DEBIAN-CVE-2026-53217, GHSA-vj9r-56j4-wwmh, ROOT-OS-DEBIAN-11-CVE-2026-53217, ROOT-OS-DEBIAN-12-CVE-2026-53217, ROOT-OS-UBUNTU-2204-CVE-2026-53217 and 2 more.