OpenBSD Errata: February 17th, 2020 (vmm_pvclock)
16 February, 2020 by tj@openbsd.org | openbsd
Errata patches for vmm have been released for OpenBSD 6.6. A missing range check in the vmm pvclock allows a guest to write to host memory. Binary updates for the amd64 platform are available via the syspatch utility. Source code patches can be found on the errata page: https://www.openbsd.org/errata66.html As these affect the kernel, a reboot will be needed after patching.