{"id":"CVE-2026-31485","title":"spi: spi-fsl-lpspi: fix teardown order issue (UAF)","summary":"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()…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < ca4483f36ac1b62e69f8b182c5b8f059e0abecfb","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < e3fd54f8b0317fbccc103961ddd660f2a32dcf0b","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < adb25339b66112393fd6892ceff926765feb5b86","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < d5d01f24bc6fbde40b4e567ef9160194b61267bc","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < 15650dfbaeeb14bcaaf053b93cf631db8d465300","Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < b341c1176f2e001b3adf0b47154fc31589f7410e","Linux 4.10"],"published":"2026-04-22","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:47:23.252Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31485","references":[{"url":"https://git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6"},{"url":"https://git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfb"},{"url":"https://git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0b"},{"url":"https://git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86"},{"url":"https://git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bc"},{"url":"https://git.kernel.org/stable/c/e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3"},{"url":"https://git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300"},{"url":"https://git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410e"}],"tags":["cve.org"],"epss":0.00131,"epssPercentile":0.03091,"ingestedAt":"2026-09-08T15:33:26.990Z","slug":"CVE-2026-31485","body":"## Overview\n\nIn 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().\n\n## Affected\n\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < ca4483f36ac1b62e69f8b182c5b8f059e0abecfb`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < e3fd54f8b0317fbccc103961ddd660f2a32dcf0b`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < adb25339b66112393fd6892ceff926765feb5b86`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < d5d01f24bc6fbde40b4e567ef9160194b61267bc`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < 15650dfbaeeb14bcaaf053b93cf631db8d465300`\n- `Linux >= 5314987de5e5f5e38436ef4a69328bc472bbd63e < b341c1176f2e001b3adf0b47154fc31589f7410e`\n- `Linux 4.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}