HCE2-SA-2022-0064 Moderate HCE 2.0 Security Fix(es): An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects, or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing, a use-after-free can be constructed on the wl_shm_pool tracking structure, where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time. (CVE-2021-3782) HCE 2.0 wayland-1.19.91-1.r4.hce2.aarch64.rpm wayland-devel-1.19.91-1.r4.hce2.aarch64.rpm wayland-help-1.19.91-1.r4.hce2.noarch.rpm wayland-1.19.91-1.r4.hce2.x86_64.rpm wayland-devel-1.19.91-1.r4.hce2.x86_64.rpm