FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, the gdi_surface_bits() function processes SURFACE_BITS_COMMAND messages sent by the RDP server. When the command is handled using NSCodec, the bmp.width and bmp.height values provided by the server are not properly validated against the actual desktop dimensions. A malicious RDP server can supply crafted bmp.width and bmp.height values that exceed the expected surface size. Because these values are used during bitmap decoding and memory operations without proper bounds checking, this can lead to a heap buffer overflow. Since the attacker can also control the associated pixel data transmitted by the server, the overflow may be exploitable to overwrite adjacent heap memory. This vulnerability is fixed in 3.24.0.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:6340 https://access.redhat.com/errata/RHSA-2026:6340
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:6727 https://access.redhat.com/errata/RHSA-2026:6727
This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:6743 https://access.redhat.com/errata/RHSA-2026:6743
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:6799 https://access.redhat.com/errata/RHSA-2026:6799
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:6918 https://access.redhat.com/errata/RHSA-2026:6918
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2026:6958 https://access.redhat.com/errata/RHSA-2026:6958
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2026:9640 https://access.redhat.com/errata/RHSA-2026:9640
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:9641 https://access.redhat.com/errata/RHSA-2026:9641
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:10076 https://access.redhat.com/errata/RHSA-2026:10076
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Advanced Update Support Via RHSA-2026:10734 https://access.redhat.com/errata/RHSA-2026:10734
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Via RHSA-2026:10735 https://access.redhat.com/errata/RHSA-2026:10735
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat Enterprise Linux 8.6 Telecommunications Update Service Via RHSA-2026:10951 https://access.redhat.com/errata/RHSA-2026:10951
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extended Lifecycle Support Via RHSA-2026:11323 https://access.redhat.com/errata/RHSA-2026:11323