kernel: drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

A flaw was found in the Linux kernel's drm/xe/uapi component. This vulnerability allows a Graphics Processing Unit GPU using cohnone coherency mode to bypass CPU caches and read stale sensitive data directly from Dynamic Random-Access Memory DRAM. This can lead to information disclosure, where da...

CVE-2026-46309

In the Linux kernel, the following vulnerability has been resolved: drm/xe/uapi: Reject cohnone PAT index for CPU cached memory in madvise Add validation in xevmmadviseioctl to reject PAT indices with XECOHNONE coherency mode when applied to CPU cached memory. Using cohnone with CPU cached buffer...

EUVD-2026-35119

In the Linux kernel, the following vulnerability has been resolved: drm/xe/uapi: Reject cohnone PAT index for CPU cached memory in madvise Add validation in xevmmadviseioctl to reject PAT indices with XECOHNONE coherency mode when applied to CPU cached memory. Using cohnone with CPU cached buffer...

PT-2026-47380

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Linux kernel where the xe vm madvise ioctl function fails to validate Page Attribute Table PAT indices. Specifically, using the XE COH NONE coherency mode with CPU...

CVE-2026-46309: Missing Release of Memory after Effective Lifetime

In the Linux kernel, the following vulnerability has been resolved: drm/xe/uapi: Reject cohnone PAT index for CPU cached memory in madvise Add validation in xevmmadviseioctl to reject PAT indices with XECOHNONE coherency mode when applied to CPU cached memory. Using cohnone with CPU cached buffer...