CVE-2026-55564
CVE-2026-55564: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium5.4
Medium [CVE-2026-55564] Out-of-bounds read in glyph cache leads to denial of service and information disclosure
CVE-2026-55564Source published Source updated
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. A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can exploit an out-of-bounds read vulnerability in the glyph_cache_get function. By sending crafted glyph fragments, the server can cause the client…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
2 more entries in the full advisory.
- Source-reported affected versions
- < 3.27.0
- Source-reported fixed versions
- 3.27.0
- Mitigation guidance
- Restrict FreeRDP client connections to trusted Remote Desktop Protocol (RDP) servers only. Avoid connecting to untrusted or potentially malicious RDP servers to prevent exploitation of this client-side vulnerability. If FreeRDP client functionality is not essential, consider removing the `freerdp` package and its dependencies.
Android app · Google Play
Monitor future Red Hat CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.