Riskcovery

CVE-2026-31485

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

State
Published
Severity
Not scored
Published
Apr 22, 2026
Updated
Oct 15, 2026
Reserved
Mar 9, 2026

Read the record on cve.org

Description

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().

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6Affected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before ca4483f36ac1b62e69f8b182c5b8f059e0abecfbAffected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before e3fd54f8b0317fbccc103961ddd660f2a32dcf0bAffected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before adb25339b66112393fd6892ceff926765feb5b86Affected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before d5d01f24bc6fbde40b4e567ef9160194b61267bcAffected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3Affected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before 15650dfbaeeb14bcaaf053b93cf631db8d465300Affected
  • 5314987de5e5f5e38436ef4a69328bc472bbd63e to before b341c1176f2e001b3adf0b47154fc31589f7410eAffected
LinuxLinux
  • 4.10Affected
  • before 4.10Not affected
  • 5.10.253 through 5.10.*Not affected
  • 5.15.203 through 5.15.*Not affected
  • 6.1.168 through 6.1.*Not affected
  • 6.6.131 through 6.6.*Not affected
  • 6.12.80 through 6.12.*Not affected
  • 6.18.21 through 6.18.*Not affected
  • 6.19.11 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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