# CVE-2025-40356: spi: rockchip-sfc: Fix DMA-API usage

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-12-16 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 6.14

## Description

In the Linux kernel, the following vulnerability has been resolved: spi: rockchip-sfc: Fix DMA-API usage Use DMA-API dma_map_single() call for getting the DMA address of the transfer buffer instead of hacking with virt_to_phys(). This fixes the following DMA-API debug warning: ------------[ cut here ]------------ DMA-API: rockchip-sfc fe300000.spi: device driver tries to sync DMA memory it has not allocated [device address=0x000000000cf70000] [size=288 bytes] WARNING: kernel/dma/debug.c:1106 at check_sync+0x1d8/0x690, CPU#2: systemd-udevd/151 Modules linked in: ... Hardware name: Hardkernel ODROID-M1 (DT) pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_sync+0x1d8/0x690 lr : check_sync+0x1d8/0x690 .. Call trace: check_sync+0x1d8/0x690 (P) debug_dma_sync_single_for_cpu+0x84/0x8c __dma_sync_single_for_cpu+0x88/0x234 rockchip_sfc_exec_mem_op+0x4a0/0x798 [spi_rockchip_sfc] spi_mem_exec_op+0x408/0x498 spi_nor_read_data+0x170/0x184 spi_nor_read_sfdp+0x74/0xe4 spi_nor_parse_sfdp+0x120/0x11f0 spi_nor_sfdp_init_params_deprecated+0x3c/0x8c spi_nor_scan+0x690/0xf88 spi_nor_probe+0xe4/0x304 spi_mem_probe+0x6c/0xa8 spi_probe+0x94/0xd4 really_probe+0xbc/0x298 ...

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-40356

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/22810d4cb0e8a7d51b24527e73beac60afc1c693
- https://git.kernel.org/stable/c/ee795e82e10197c070efd380dc9615c73dffad6c

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Page: https://cve.now/CVE-2025-40356
JSON: https://cve.now/api/v1/entries/CVE-2025-40356
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