CVE-2026-67291 | BDVDB-2026-354576 Detail

Description#

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.

Impact#

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Exploit#

History#

1. Version 12026-08-01Record published in the CVE List.
2. Version 22026-08-03Most recent update recorded in the CVE List.