UBUNTU-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...

CVE-2026-46309

The CVE-2026-46309 entry describes a Linux kernel issue in drm/xe/uapi where PAT indices with XE_COH_NONE coherency are rejected for CPU cached memory in madvise. The fix adds validation in xe_vm_madvise_ioctl() to prevent using coh_none on CPU cached buffers, as such usage could allow a GPU to b...