An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry. CREATE(Triage):(User=admin) CVE-2021-26934 (https://nvd.nist.gov/vuln/detail/CVE-2021-26934)
