Bug 2425200 (CVE-2022-50767) - CVE-2022-50767 kernel: fbdev: smscufx: Fix several use-after-free bugs
Summary: CVE-2022-50767 kernel: fbdev: smscufx: Fix several use-after-free bugs
Keywords:
Status: NEW
Alias: CVE-2022-50767
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-24 14:10 UTC by OSIDB Bzimport
Modified: 2026-06-29 19:00 UTC (History)
2 users (show)

Fixed In Version:
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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
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