SUSE-SU-2023:1874-1

Описание

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.

Затронутые продукты

Ссылки

• https://www.suse.com/security/cve/CVE-2021-3782.html
  CVE-2021-3782
• https://bugzilla.suse.com/1190486
  SUSE Bug 1190486