CVE-2026-31485 (GCVE-0-2026-31485)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54
VLAI?
Title
spi: spi-fsl-lpspi: fix teardown order issue (UAF)
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6 (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < ca4483f36ac1b62e69f8b182c5b8f059e0abecfb (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < e3fd54f8b0317fbccc103961ddd660f2a32dcf0b (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < adb25339b66112393fd6892ceff926765feb5b86 (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < d5d01f24bc6fbde40b4e567ef9160194b61267bc (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3 (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < 15650dfbaeeb14bcaaf053b93cf631db8d465300 (git)
Affected: 5314987de5e5f5e38436ef4a69328bc472bbd63e , < b341c1176f2e001b3adf0b47154fc31589f7410e (git)
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    Linux Linux Affected: 4.10
Unaffected: 0 , < 4.10 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-fsl-lpspi.c"
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              "status": "unaffected",
              "version": "5.10.253",
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
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              "status": "unaffected",
              "version": "6.18.21",
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-fsl-lpspi: fix teardown order issue (UAF)\n\nThere is a teardown order issue in the driver. The SPI controller is\nregistered using devm_spi_register_controller(), which delays\nunregistration of the SPI controller until after the fsl_lpspi_remove()\nfunction returns.\n\nAs the fsl_lpspi_remove() function synchronously tears down the DMA\nchannels, a running SPI transfer triggers the following NULL pointer\ndereference due to use after free:\n\n| fsl_lpspi 42550000.spi: I/O Error in DMA RX\n| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[...]\n| Call trace:\n|  fsl_lpspi_dma_transfer+0x260/0x340 [spi_fsl_lpspi]\n|  fsl_lpspi_transfer_one+0x198/0x448 [spi_fsl_lpspi]\n|  spi_transfer_one_message+0x49c/0x7c8\n|  __spi_pump_transfer_message+0x120/0x420\n|  __spi_sync+0x2c4/0x520\n|  spi_sync+0x34/0x60\n|  spidev_message+0x20c/0x378 [spidev]\n|  spidev_ioctl+0x398/0x750 [spidev]\n[...]\n\nSwitch from devm_spi_register_controller() to spi_register_controller() in\nfsl_lpspi_probe() and add the corresponding spi_unregister_controller() in\nfsl_lpspi_remove()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:54:10.892Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6"
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        {
          "url": "https://git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfb"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0b"
        },
        {
          "url": "https://git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86"
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          "url": "https://git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bc"
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        },
        {
          "url": "https://git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300"
        },
        {
          "url": "https://git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410e"
        }
      ],
      "title": "spi: spi-fsl-lpspi: fix teardown order issue (UAF)",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31485",
    "datePublished": "2026-04-22T13:54:10.892Z",
    "dateReserved": "2026-03-09T15:48:24.101Z",
    "dateUpdated": "2026-04-22T13:54:10.892Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31485\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-22T14:16:45.923\",\"lastModified\":\"2026-04-22T14:16:45.923\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nspi: spi-fsl-lpspi: fix teardown order issue (UAF)\\n\\nThere is a teardown order issue in the driver. The SPI controller is\\nregistered using devm_spi_register_controller(), which delays\\nunregistration of the SPI controller until after the fsl_lpspi_remove()\\nfunction returns.\\n\\nAs the fsl_lpspi_remove() function synchronously tears down the DMA\\nchannels, a running SPI transfer triggers the following NULL pointer\\ndereference due to use after free:\\n\\n| fsl_lpspi 42550000.spi: I/O Error in DMA RX\\n| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\\n[...]\\n| Call trace:\\n|  fsl_lpspi_dma_transfer+0x260/0x340 [spi_fsl_lpspi]\\n|  fsl_lpspi_transfer_one+0x198/0x448 [spi_fsl_lpspi]\\n|  spi_transfer_one_message+0x49c/0x7c8\\n|  __spi_pump_transfer_message+0x120/0x420\\n|  __spi_sync+0x2c4/0x520\\n|  spi_sync+0x34/0x60\\n|  spidev_message+0x20c/0x378 [spidev]\\n|  spidev_ioctl+0x398/0x750 [spidev]\\n[...]\\n\\nSwitch from devm_spi_register_controller() to spi_register_controller() in\\nfsl_lpspi_probe() and add the corresponding spi_unregister_controller() in\\nfsl_lpspi_remove().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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