Affected: AlmaLinux:9: freerdp, AlmaLinux:9: freerdp-devel, AlmaLinux:9: freerdp-libs, AlmaLinux:9: libwinpr, AlmaLinux:9: libwinpr-devel

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

* freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling (CVE-2026-109242) * freerdp: freerdp: Denial of Service via heap-based buffer overflow during MP3 audio decoding (CVE-2026-110837) * freerdp: freerdp: Denial of Service via heap out-of-bounds write in NTLM authentication (CVE-2026-111880)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.

security update for freerdp

freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling freerdp: FreeRDP 3.0.0-beta1 before 3.32.0 Use-After-Free via Smartcard Connect freerdp: freerdp: Denial of Service via file descriptor exhaustion in serial device handling freerdp: freerdp: Denial of Service via unbounded memory consumption during RDPDR reassembly freerdp: freerdp: Denial of Service via heap-based buffer overflow during MP3 audio decoding freerdp: FreeRDP: Unauthenticated keystroke injection via premature input dispatch freerdp: FreeRDP: Denial of Service via grayscale JPEG clipboard conversion freerdp: freerdp: Denial of Service via memory exhaustion in NLA frame parser freerdp: FreeRDP: Arbitrary code execution via crafted persistent cache file freerdp: freerdp: Arbitrary code execution via crafted persistent cache file freerdp: freerdp: Arbitrary code execution via crafted display frames freerdp: freerdp: Denial of Service via heap out-of-bounds write in NTLM authentication freerdp: FreeRDP: heap buffer overflow in server rdpsnd via crafted audio formats freerdp: FreeRDP: Denial of Service via malformed image clipboard payloads freerdp: freerdp: Denial of Service via uncontrolled memory allocation in dynamic virtual channels freerdp: FreeRDP: Denial of Service via assertion failure in RemoteFX decoder freerdp: freerdp: Denial of Service via zero-width graphics reset freerdp: freerdp: Denial of Service via zero-length dynamic virtual channel messages

Affected: Ubuntu:16.04:LTS: freerdp, Ubuntu:Pro:18.04:LTS: freerdp2, Ubuntu:18.04:LTS: freerdp, Ubuntu:Pro:20.04:LTS: freerdp2, Ubuntu:22.04:LTS: freerdp2, Ubuntu:24.04:LTS: freerdp3, Ubuntu:Pro:24.04:LTS: freerdp2, Ubuntu:26.04:LTS: freerdp3

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.