spi: use generic driver_override infrastructure

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Summary

CVECVE-2026-31487
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:46 UTC
Updated2026-04-22 14:16:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: spi: use generic driver_override infrastructure When a driver is probed through __driver_attach(), the bus' match() callback is called without the device lock held, thus accessing the driver_override field without a lock, which can cause a UAF. Fix this by using the driver-core driver_override infrastructure taking care of proper locking internally. Note that calling match() from __driver_attach() without the device lock held is intentional. [1] Also note that we do not enable the driver_override feature of struct bus_type, as SPI - in contrast to most other buses - passes "" to sysfs_emit() when the driver_override pointer is NULL. Thus, printing "\n" instead of "(null)\n".

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5039563e7c25eccd7fec1de6706011009d1c5665 eedf220442d13b6d97294e5b0ac8a2c38ee1a1a0 git Not specified
CNA Linux Linux affected 5039563e7c25eccd7fec1de6706011009d1c5665 c73a58661a760373d08a6883af4f0bb5cc991a67 git Not specified
CNA Linux Linux affected 5039563e7c25eccd7fec1de6706011009d1c5665 e0ae367a2de06c49aa1de6ec9b1ab6860bbb2cf0 git Not specified
CNA Linux Linux affected 5039563e7c25eccd7fec1de6706011009d1c5665 cc34d77dd48708d810c12bfd6f5bf03304f6c824 git Not specified
CNA Linux Linux affected 4.20 Not specified
CNA Linux Linux unaffected 4.20 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

ReferenceSourceLinkTags
git.kernel.org/stable/c/e0ae367a2de06c49aa1de6ec9b1ab6860bbb2cf0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/eedf220442d13b6d97294e5b0ac8a2c38ee1a1a0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c73a58661a760373d08a6883af4f0bb5cc991a67 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cc34d77dd48708d810c12bfd6f5bf03304f6c824 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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