CVE-2026-55564
freerdp3: FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-55564 is fixed in 34 products on 1 platform, first by DEBIAN-CVE-2026-55564, released July 8, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.1
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0033
26th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| freerdp · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-debugsource · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-libs · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-libs-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy-modules 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-sdl 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-server · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-server-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| freerdp-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-shadow-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-wayland 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3 · Debian 14 | 3.27.0+dfsg-1 | DEBIAN-CVE-2026-55564 | Jul 8, 2026 |
| freerdp3-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy-modules 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-sdl 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-shadow-x11 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-shadow-x11 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| freerdp3-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-shadow-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-wayland · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-wayland 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| freerdp3-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-wayland 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-x11 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-x11 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| freerdp3-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-client3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-client3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-client3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-client3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-server-proxy3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server-proxy3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-server3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-server3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-server3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow-subsystem3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow-subsystem3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libwinpr · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| libwinpr-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| libwinpr-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 | Aug 3, 2026 |
| libwinpr-tools3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libwinpr-tools3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libwinpr-tools3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libwinpr-tools3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libwinpr3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libwinpr3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libwinpr3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libwinpr3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| winpr-utils · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | winpr-utils 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| winpr3-utils · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | winpr3-utils 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| winpr3-utils · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | winpr3-utils 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
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