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spi: spi-fsl-lpspi: fix teardown order issue (UAF)

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: spi: spi-fsl-lpspi: fix teardown order issue (UAF) There is a teardown order issue in the driver. The SPI controller is registered using devm_spi_register_controller(), which delays unregistration of the SPI controller until after the fsl_lpspi_remove() function returns. As the fsl_lpspi_remove() function synchronously tears down the DMA channels, a running SPI transfer triggers the following NULL pointer dereference due to use after free: | fsl_lpspi 42550000.spi: I/O Error in DMA RX | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [...] | Call trace: | fsl_lpspi_dma_transfer+0x260/0x340 [spi_fsl_lpspi] | fsl_lpspi_transfer_one+0x198/0x448 [spi_fsl_lpspi] | spi_transfer_one_message+0x49c/0x7c8 | __spi_pump_transfer_message+0x120/0x420 | __spi_sync+0x2c4/0x520 | spi_sync+0x34/0x60 | spidev_message+0x20c/0x378 [spidev] | spidev_ioctl+0x398/0x750 [spidev] [...] Switch from devm_spi_register_controller() to spi_register_controller() in fsl_lpspi_probe() and add the corresponding spi_unregister_controller() in fsl_lpspi_remove().

Announced Source revision 1
Original source ↗

CVE-2026-31485

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-31485

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "ca4483f36ac1b62e69f8b182c5b8f059e0abecfb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "e3fd54f8b0317fbccc103961ddd660f2a32dcf0b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "adb25339b66112393fd6892ceff926765feb5b86",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "d5d01f24bc6fbde40b4e567ef9160194b61267bc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "15650dfbaeeb14bcaaf053b93cf631db8d465300",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5314987de5e5f5e38436ef4a69328bc472bbd63e",
        "lessThan": "b341c1176f2e001b3adf0b47154fc31589f7410e",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/spi/spi-fsl-lpspi.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.168",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.131",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.80",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.21",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.11",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/spi/spi-fsl-lpspi.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31485

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28281 · Revision 1
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