spi: spi-fsl-lpspi: fix teardown order issue (UAF)
Summary
| CVE | CVE-2026-31485 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
|---|
| Published | 2026-04-22 14:16:45 UTC |
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| Updated | 2026-04-22 14:16:45 UTC |
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| 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(). |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e ca4483f36ac1b62e69f8b182c5b8f059e0abecfb git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e e3fd54f8b0317fbccc103961ddd660f2a32dcf0b git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e adb25339b66112393fd6892ceff926765feb5b86 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e d5d01f24bc6fbde40b4e567ef9160194b61267bc git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e 15650dfbaeeb14bcaaf053b93cf631db8d465300 git |
Not specified |
| CNA |
Linux |
Linux |
affected 5314987de5e5f5e38436ef4a69328bc472bbd63e b341c1176f2e001b3adf0b47154fc31589f7410e git |
Not specified |
| CNA |
Linux |
Linux |
affected 4.10 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 4.10 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.10.253 5.10.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 5.15.203 5.15.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.168 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.131 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.80 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.21 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.19.11 6.19.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/e89e2b97253c124d37bf88e96e5e8ce5c3aeeec3 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/b341c1176f2e001b3adf0b47154fc31589f7410e |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/ca4483f36ac1b62e69f8b182c5b8f059e0abecfb |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e3fd54f8b0317fbccc103961ddd660f2a32dcf0b |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/fbe6f40caeebb0b1ea9dfedc259124c1d3cda7a6 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/d5d01f24bc6fbde40b4e567ef9160194b61267bc |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/15650dfbaeeb14bcaaf053b93cf631db8d465300 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/adb25339b66112393fd6892ceff926765feb5b86 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
