Bug 2436767 (CVE-2026-23068)

Summary: CVE-2026-23068 kernel: spi: spi-sprd-adi: Fix double free in probe error path
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-02-04 17:02:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: spi-sprd-adi: Fix double free in probe error path

The driver currently uses spi_alloc_host() to allocate the controller
but registers it using devm_spi_register_controller().

If devm_register_restart_handler() fails, the code jumps to the
put_ctlr label and calls spi_controller_put(). However, since the
controller was registered via a devm function, the device core will
automatically call spi_controller_put() again when the probe fails.
This results in a double-free of the spi_controller structure.

Fix this by switching to devm_spi_alloc_host() and removing the
manual spi_controller_put() call.
Comment 1 Jon Moroney 2026-02-05 00:47:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026020417-CVE-2026-23068-0852@gregkh/T