{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "faa8e404ad8e686cb98c51dc507fdcacfb8020ce"
            },
            {
              "fixed": "40dee2d3e9994aed9efe7bed40eb0e4d38d5a25c"
            },
            {
              "fixed": "245404c26563aafb36aafb01298f148db1851be3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72134.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: imx: reconfigure for PIO when DMA cannot be started\n\nWhen spi_imx_can_dma() selects DMA, the ECSPI is configured for DMA:\nspi_imx_setupxfer() sets CTRL.SMC and clears dynamic_burst, and\nspi_imx_dma_transfer() programs the dynamic-burst BURST_LENGTH and the\nSDMA watermarks.\n\nIf the DMA descriptor cannot be prepared (dmaengine_prep_slave_single()\nreturns NULL), the transfer is failed with SPI_TRANS_FAIL_NO_START and\nfalls back to PIO. The dynamic-burst DMA path uses its own bounce\nbuffers instead of the SPI core's mapping, so xfer-\u003e{tx,rx}_sg_mapped\nare not set and the core's DMA-\u003ePIO retry is skipped; the driver falls\nback to PIO internally. But none of the DMA-mode configuration is\nundone, so the PIO transfer runs with CTRL.SMC set, the wrong burst\nlength and dynamic_burst cleared, and the transferred data is corrupted.\n\nThis is easily hit on i.MX8MP boards that describe ECSPI DMA in the\ndevice tree but run SDMA on ROM firmware (no external sdma-imx7d.bin):\nevery ECSPI DMA prepare fails. An Infineon SLB9670 TPM on ECSPI1 then\nreturns shifted TPM2_GetCapability data, is flagged \"field failure\nmode\", /dev/tpmrm0 is never created.\n\nSet controller-\u003efallback before re-running spi_imx_setupxfer() so the\nECSPI is reconfigured exactly like a normal PIO transfer. With\ncontroller-\u003efallback set, spi_imx_setupxfer() sees spi_imx_can_dma()\nreturn false, so it clears spi_imx-\u003eusedma and reprograms the controller\n(clears CTRL.SMC, restores dynamic_burst and the PIO burst length). No\nexplicit spi_imx-\u003eusedma = false is needed: setupxfer() already updates\nit from the can_dma() result.",
  "id": "CVE-2026-72134",
  "modified": "2026-08-18T03:31:04.974702250Z",
  "published": "2026-08-15T05:53:09.573Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/245404c26563aafb36aafb01298f148db1851be3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40dee2d3e9994aed9efe7bed40eb0e4d38d5a25c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72134.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72134"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "spi: imx: reconfigure for PIO when DMA cannot be started"
}