# CVE-2025-40356: linux: In the Linux kernel, the following vulnerability has been resolved:  spi: rockchip-sfc: Fix DMA-API usage  Use DMA-AP...

CVE-2025-40356 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40356 (version 6.17.6-1), released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40356
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## 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  ...

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40356](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40356.md) | Dec 16, 2025 |

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