Threats Tagged 'cve-2026-67291'

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: Memory disclosure or denial of service via crafted RDP update orders (CVE-2026-67301) * FreeRDP: FreeRDP: Denial of Service via crafted smartcard cache requests (CVE-2026-67288) * FreeRDP: FreeRDP: Denial of Service via heap out-of-bounds read (CVE-2026-67291) * FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response (CVE-2026-55194) 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 before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in update_process_glyph_fragments()/glyph_cache_fragment_put() in libfreerdp/cache/glyph.c. When handling a GLYPH_FRAGMENT_ADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it fits within the remaining received buffer before allocating and copying that many bytes. A malicious RDP server can send a short fragment with an oversized declared size, causing the client to read beyond the allocated buffer, resulting in an out-of-bounds read and client crash.