CVE-2026-23236
HIGHCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Lifecycle Timeline
3Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: properly copy ioctl memory to kernelspace The UFX_IOCTL_REPORT_DAMAGE ioctl does not properly copy data from userspace to kernelspace, and instead directly references the memory, which can cause problems if invalid data is passed from userspace. Fix this all up by correctly copying the memory before accessing it within the kernel.
Analysis
The Linux kernel fbdev smscufx driver fails to properly copy user-supplied data to kernel memory in the UFX_IOCTL_REPORT_DAMAGE ioctl handler, instead directly referencing userspace memory which can be manipulated or invalidated. A local attacker with appropriate privileges can exploit this to cause a denial of service by triggering kernel memory access violations or crashes. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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