Bug 2486450 (CVE-2026-46301)

Summary: CVE-2026-46301 kernel: spi: topcliff-pch: fix use-after-free on unbind
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's spi-topcliff-pch driver. This vulnerability, a use-after-free error, occurs when the driver attempts to release Direct Memory Access (DMA) buffers during an unbind operation without properly flushing its queue. An attacker could potentially exploit this memory corruption issue to cause a denial of service or, in some scenarios, achieve arbitrary code execution.
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Description OSIDB Bzimport 2026-06-08 17:02:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: topcliff-pch: fix use-after-free on unbind

Give the driver a chance to flush its queue before releasing the DMA
buffers on driver unbind
Comment 1 Keith Grant 2026-06-08 18:57:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026060859-CVE-2026-46301-5988@gregkh/T