Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3906
Advisory Released Date: 2026-09-14
Advisory Updated Date: 2026-09-14
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats in channels/rdpsnd/server/rdpsnd_main.c frees context->client_formats on a malformed Client Audio Formats PDU without clearing the owning pointer or num_client_formats. An authenticated RDP client can trigger an error such as a cbSize larger than the remaining record, leave the dangling pointer in the server context, and cause rdpsnd_server_context_free to free the same allocation again at session teardown. This reliably terminates the server and can create allocator-dependent heap corruption. This issue is fixed in version 3.28.0. (CVE-2026-63652)
Affected Packages:
freerdp
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update freerdp or yum update --advisory ALAS2-2026-3906 to update your system.
aarch64:
freerdp-2.11.7-1.amzn2.0.15.aarch64
freerdp-libs-2.11.7-1.amzn2.0.15.aarch64
freerdp-devel-2.11.7-1.amzn2.0.15.aarch64
libwinpr-2.11.7-1.amzn2.0.15.aarch64
libwinpr-devel-2.11.7-1.amzn2.0.15.aarch64
freerdp-debuginfo-2.11.7-1.amzn2.0.15.aarch64
i686:
freerdp-2.11.7-1.amzn2.0.15.i686
freerdp-libs-2.11.7-1.amzn2.0.15.i686
freerdp-devel-2.11.7-1.amzn2.0.15.i686
libwinpr-2.11.7-1.amzn2.0.15.i686
libwinpr-devel-2.11.7-1.amzn2.0.15.i686
freerdp-debuginfo-2.11.7-1.amzn2.0.15.i686
src:
freerdp-2.11.7-1.amzn2.0.15.src
x86_64:
freerdp-2.11.7-1.amzn2.0.15.x86_64
freerdp-libs-2.11.7-1.amzn2.0.15.x86_64
freerdp-devel-2.11.7-1.amzn2.0.15.x86_64
libwinpr-2.11.7-1.amzn2.0.15.x86_64
libwinpr-devel-2.11.7-1.amzn2.0.15.x86_64
freerdp-debuginfo-2.11.7-1.amzn2.0.15.x86_64