Описание
FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.
A flaw was found in FreeRDP server. This use-after-free vulnerability exists in the DRDYNVC parser, where a channel pointer is dereferenced after its synchronization lock has been released. An authenticated client can exploit this by racing AUDIN channel closure messages against DRDYNVC data parsing, leading to memory corruption. This could potentially result in arbitrary code execution or a denial of service.
Отчет
This vulnerability is rated as Important severity because an authenticated remote attacker could trigger memory corruption leading to service denial or arbitrary code execution, though exploitation requires winning a race condition during session teardown. In Red Hat Enterprise Linux, FreeRDP is primarily utilized as a client-side suite and library, and server-side components are not enabled or running by default in standard installations. Consequently, typical systems are not exposed to this flaw unless an administrator explicitly deploys an RDP server implementation utilizing the affected FreeRDP server libraries.
Меры по смягчению последствий
The vulnerability requires an authenticated client to interact with the FreeRDP server. To mitigate this issue, restrict network access to the FreeRDP server to only trusted clients and networks. If the FreeRDP server functionality is not required, consider disabling or uninstalling the FreeRDP server component to eliminate the attack surface.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 8 | freerdp | Not affected | ||
| Red Hat Enterprise Linux 9 | freerdp | Affected | ||
| Red Hat Enterprise Linux 10 | freerdp | Fixed | RHSA-2026:75570 | 05.10.2026 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | freerdp | Fixed | RHSA-2026:93559 | 02.11.2026 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.
FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.
FreeRDP server versions before 3.31.0 contain a use-after-free vulnera ...
EPSS
7.5 High
CVSS3