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.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | released | 1.16.0-1ubuntu1.1~18.04.4 |
| devel | not-affected | 1.21.0-1 |
| esm-infra/bionic | released | 1.16.0-1ubuntu1.1~18.04.4 |
| esm-infra/focal | released | 1.18.0-1ubuntu0.1 |
| esm-infra/xenial | released | 1.12.0-1~ubuntu16.04.3+esm1 |
| focal | released | 1.18.0-1ubuntu0.1 |
| jammy | released | 1.20.0-1ubuntu0.1 |
| kinetic | not-affected | 1.21.0-1 |
| trusty | ignored | end of standard support |
| upstream | needs-triage |
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EPSS
6.6 Medium
CVSS3
Связанные уязвимости
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.
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.
An internal reference count is held on the buffer pool, incremented ev ...
EPSS
6.6 Medium
CVSS3