Bug 2482603 (CVE-2026-46228)

Summary: CVE-2026-46228 kernel: spi: ch341: fix devres lifetime
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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A flaw was found in the Linux kernel, specifically within the `spi: ch341` driver. This vulnerability arises from incorrect management of device resources (devres) lifetime. When a Universal Serial Bus (USB) driver is unbound, the associated resources are not properly released, which can lead to memory leaks. This issue can occur during scenarios such as probe deferral or configuration changes, potentially impacting system stability and performance.
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Description OSIDB Bzimport 2026-05-28 11:05:22 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: ch341: fix devres lifetime

USB drivers bind to USB interfaces and any device managed resources
should have their lifetime tied to the interface rather than parent USB
device. This avoids issues like memory leaks when drivers are unbound
without their devices being physically disconnected (e.g. on probe
deferral or configuration changes).

Fix the controller and driver data lifetime so that they are released
on driver unbind.

Note that this also makes sure that the SPI controller is placed
correctly under the USB interface in the device tree.
Comment 1 Keith Grant 2026-05-28 12:30:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052839-CVE-2026-46228-6650@gregkh/T