CVE-2026-31485spi: spi-fsl-lpspi: fix teardown order issue (UAF)
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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().
- CVSS
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5314987de5e5f5e38436ef4a69328bc472bbd63e before fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before ca4483f36ac1b62e69f8b182c5b8f059e0abecfb; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before e3fd54f8b0317fbccc103961ddd660f2a32dcf0b; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before adb25339b66112393fd6892ceff926765feb5b86; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before d5d01f24bc6fbde40b4e567ef9160194b61267bc; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3; 5314987de5e5f5e38436ef4a69328bc472bbd63e builds before 15650dfbaeeb14bcaaf053b93cf631db8d465300; from 5314987de5e5f5e38436ef4a69328bc472bbd63e before b341c1176f2e001b3adf0b47154fc31589f7410e | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.10.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 4.10; and 7 more ranges | NVD |
References
- https://git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6patch
- https://git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfbpatch
- https://git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0bpatch
- https://git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86patch
- https://git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bcpatch
- https://git.kernel.org/stable/c/e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3patch
- https://git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300patch
- https://git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410epatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.