CVE-2026-55564

01/תיאור (מקור, אנגלית)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, the glyph_cache_get function in libfreerdp/cache/glyph.c checks whether index is greater than cache->number instead of greater than or equal to it. A malicious RDP server can use GLYPH_FRAGMENT_USE replay in update_process_glyph_fragments to make the default cache receive index 254 when cache->number is 254, reading one pointer beyond the entries array and dereferencing it as a glyph. This can crash the client and may disclose adjacent heap data. This issue is fixed in version 3.27.0.

02/מוצרים מושפעים

freerdp: freerdp

03/קישורים5

• github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6xmj-pr98-‮… ExploitMitigationVendor Advisory
• github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6xmj-pr98-‮… ExploitMitigationVendor Advisory
• github.com/FreeRDP/FreeRDP/commit/c29324750e3cbcba8761f147b7a5‮… Patch
• github.com/FreeRDP/FreeRDP/pull/12885 Issue TrackingPatch
• github.com/FreeRDP/FreeRDP/releases/tag/3.27.0 Release Notes