Out-of-bounds Read Affecting freerdp3 package, versions *


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.44% (36th percentile)

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  • Snyk IDSNYK-ECHOLATEST-FREERDP3-18066880
  • published21 Jul 2026
  • disclosed19 Aug 2026

Introduced: 21 Jul 2026

CVE-2026-55564  (opens in a new tab)
CWE-125  (opens in a new tab)
CWE-193  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest freerdp3.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1