Bug 2425200 (CVE-2022-50767)

Summary: CVE-2022-50767 kernel: fbdev: smscufx: Fix several use-after-free bugs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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OS: Linux   
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Description OSIDB Bzimport 2025-12-24 14:10:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

fbdev: smscufx: Fix several use-after-free bugs

Several types of UAFs can occur when physically removing a USB device.

Adds ufx_ops_destroy() function to .fb_destroy of fb_ops, and
in this function, there is kref_put() that finally calls ufx_free().

This fix prevents multiple UAFs.
Comment 1 Alexander B 2025-12-24 19:10:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122457-CVE-2022-50767-9a13@gregkh/T