CVE-2021-3782

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.

Link	Resource
https://gitlab.freedesktop.org/wayland/wayland/-/issues/224	Exploit Issue Tracking

Configuration 1

cpe:2.3:a:wayland:wayland:*:*:*:*:*:*:*:*

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Published : 2022-09-23 04:15

Updated : 2022-09-26 10:29

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NVD link : CVE-2021-3782

Mitre link : CVE-2021-3782

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NVD-CWE-Other