Bug 2400699 (CVE-2023-53459)

Summary: CVE-2023-53459 kernel: HID: mcp-2221: prevent UAF in delayed work
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-01 12:02:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

HID: mcp-2221: prevent UAF in delayed work

If the device is plugged/unplugged without giving time for mcp_init_work()
to complete, we might kick in the devm free code path and thus have
unavailable struct mcp_2221 while in delayed work.

Canceling the delayed_work item is enough to solve the issue, because
cancel_delayed_work_sync will prevent the work item to requeue itself.
Comment 1 Jon Moroney 2025-10-01 23:32:25 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100106-CVE-2023-53459-48f3@gregkh/T