Bug 2468148 (CVE-2026-43460)

Summary: CVE-2026-43460 kernel: spi: rockchip-sfc: Fix double-free in remove() callback
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's rockchip-sfc driver. This vulnerability occurs because the driver attempts to unregister a Serial Peripheral Interface (SPI) controller twice during device removal. This double-free operation can lead to memory corruption, which may allow a local attacker to cause a system crash (denial of service) or potentially execute unauthorized code.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-08 15:01:39 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: rockchip-sfc: Fix double-free in remove() callback

The driver uses devm_spi_register_controller() for registration, which
automatically unregisters the controller via devm cleanup when the
device is removed. The manual call to spi_unregister_controller() in
the remove() callback can lead to a double-free.

And to make sure controller is unregistered before DMA buffer is
unmapped, switch to use spi_register_controller() in probe().
Comment 1 Keith Grant 2026-05-09 01:07:32 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050801-CVE-2026-43460-5893@gregkh/T