CVE ID:	CVE-2021-3782
Description:	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.
Test IDs:	1.3.6.1.4.1.25623.1.1.2.2023.1519   1.3.6.1.4.1.25623.1.1.12.2022.5614.1   1.3.6.1.4.1.25623.1.1.4.2023.1864.1   1.3.6.1.4.1.25623.1.1.2.2022.2784   1.3.6.1.4.1.25623.1.1.2.2022.2862   1.3.6.1.4.1.25623.1.1.2.2023.1159   1.3.6.1.4.1.25623.1.1.2.2023.1180   1.3.6.1.4.1.25623.1.1.12.2022.5614.2   1.3.6.1.4.1.25623.1.1.2.2023.1239   1.3.6.1.4.1.25623.1.1.2.2023.1343   1.3.6.1.4.1.25623.1.1.2.2023.1209   1.3.6.1.4.1.25623.1.1.2.2022.2749   1.3.6.1.4.1.25623.1.1.2.2023.1710   1.3.6.1.4.1.25623.1.1.10.2022.0418   1.3.6.1.4.1.25623.1.1.2.2022.2836
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3782 https://gitlab.freedesktop.org/wayland/wayland/-/issues/224 https://gitlab.freedesktop.org/wayland/wayland/-/issues/224