Out-of-bounds Read Affecting freerdp package, versions <2:2.11.7-1.el9_6.13


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.65% (49th percentile)

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  • Snyk IDSNYK-RHEL9-FREERDP-20084899
  • published24 Sept 2026
  • disclosed1 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-67291  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade RHEL:9 freerdp to version 2:2.11.7-1.el9_6.13 or higher.
This issue was patched in RHSA-2026:71387.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp package and not the freerdp package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1