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Vulnerabilities / CVE-2026-55194

critical

CVE-2026-55194

FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response

Published Modified CWE 122
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (high), AlmaLinux (high), Amazon (high), Oracle (high), Rocky Linux (high), Ubuntu (medium).

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0.

Affected packages and fixed versions

SourcePackageFixed in
alma 10freerdp, freerdp-devel, freerdp-libs and 3 more2:3.10.3-12.el10_2.10
alma 8freerdp, freerdp-devel, freerdp-libs and 2 more2:2.11.7-12.el8_10
alma 9freerdp, freerdp-devel, freerdp-libs and 2 more2:2.11.7-7.el9_8.6
alpine 3.24freerdp3.27.1-r0
alpine edgefreerdp3.27.1-r0
amazon linux 2freerdp, freerdp-debuginfo, freerdp-devel and 3 more2:2.11.7-1.amzn2.0.13
amazon linux 2023freerdp, freerdp-debuginfo, freerdp-debugsource and 8 more2:3.6.3-1.amzn2023.0.13
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp3no fix listed
debian 14freerdp33.27.0+dfsg-1
echofreerdp2, freerdp3no fix listed
Show all 112 entries from 34 sources
SourcePackageFixed in
alma 10freerdp2:3.10.3-12.el10_2.10
alma 10freerdp-devel2:3.10.3-12.el10_2.10
alma 10freerdp-libs2:3.10.3-12.el10_2.10
alma 10freerdp-server2:3.10.3-12.el10_2.10
alma 10libwinpr2:3.10.3-12.el10_2.10
alma 10libwinpr-devel2:3.10.3-12.el10_2.10
alma 8freerdp2:2.11.7-12.el8_10
alma 8freerdp-devel2:2.11.7-12.el8_10
alma 8freerdp-libs2:2.11.7-12.el8_10
alma 8libwinpr2:2.11.7-12.el8_10
alma 8libwinpr-devel2:2.11.7-12.el8_10
alma 9freerdp2:2.11.7-7.el9_8.6
alma 9freerdp-devel2:2.11.7-7.el9_8.6
alma 9freerdp-libs2:2.11.7-7.el9_8.6
alma 9libwinpr2:2.11.7-7.el9_8.6
alma 9libwinpr-devel2:2.11.7-7.el9_8.6
alpine 3.24freerdp3.27.1-r0
alpine edgefreerdp3.27.1-r0
amazon linux 2freerdp2:2.11.7-1.amzn2.0.13
amazon linux 2freerdp-debuginfo2:2.11.7-1.amzn2.0.13
amazon linux 2freerdp-devel2:2.11.7-1.amzn2.0.13
amazon linux 2freerdp-libs2:2.11.7-1.amzn2.0.13
amazon linux 2libwinpr2:2.11.7-1.amzn2.0.13
amazon linux 2libwinpr-devel2:2.11.7-1.amzn2.0.13
amazon linux 2023freerdp2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-debuginfo2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-debugsource2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-devel2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-libs2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-libs-debuginfo2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-server2:3.6.3-1.amzn2023.0.13
amazon linux 2023freerdp-server-debuginfo2:3.6.3-1.amzn2023.0.13
amazon linux 2023libwinpr2:3.6.3-1.amzn2023.0.13
amazon linux 2023libwinpr-debuginfo2:3.6.3-1.amzn2023.0.13
amazon linux 2023libwinpr-devel2:3.6.3-1.amzn2023.0.13
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp3no fix listed
debian 14freerdp33.27.0+dfsg-1
echofreerdp2no fix listed
echofreerdp3no fix listed
Oracle Linux 7freerdp2.1.1-5.0.13.el7_9
Oracle Linux 7freerdp-devel2.1.1-5.0.13.el7_9
Oracle Linux 7freerdp-libs2.1.1-5.0.13.el7_9
Oracle Linux 7libwinpr2.1.1-5.0.13.el7_9
Oracle Linux 7libwinpr-devel2.1.1-5.0.13.el7_9
Oracle Linux 8freerdp2:2.11.7-12.el8_10
Oracle Linux 8freerdp-devel2:2.11.7-12.el8_10
Oracle Linux 8freerdp-libs2:2.11.7-12.el8_10
Oracle Linux 8libwinpr2:2.11.7-12.el8_10
Oracle Linux 8libwinpr-devel2:2.11.7-12.el8_10
Oracle Linux 9freerdp2:2.11.7-7.el9_8.6
Oracle Linux 9freerdp-devel2:2.11.7-7.el9_8.6
Oracle Linux 9freerdp-libs2:2.11.7-7.el9_8.6
Oracle Linux 9libwinpr2:2.11.7-7.el9_8.6
Oracle Linux 9libwinpr-devel2:2.11.7-7.el9_8.6
rapidfort alma 10freerdp2:3.10.3-12.el10_2.10
rapidfort alma 10freerdp-devel2:3.10.3-12.el10_2.10
rapidfort alma 10freerdp-libs2:3.10.3-12.el10_2.10
rapidfort alma 10freerdp-server2:3.10.3-12.el10_2.10
rapidfort alma 10libwinpr2:3.10.3-12.el10_2.10
rapidfort alma 10libwinpr-devel2:3.10.3-12.el10_2.10
rapidfort alma 9freerdp2:2.11.7-7.el9_8.6
rapidfort alma 9freerdp-libs2:2.11.7-7.el9_8.6
rapidfort alma 9libwinpr2:2.11.7-7.el9_8.6
rapidfort alpine 3.20freerdp3.27.1-r0
rapidfort alpine 3.21freerdp3.27.1-r0
rapidfort alpine 3.22freerdp3.27.1-r0
rapidfort alpine 3.23freerdp3.27.1-r0
rapidfort alpine 3.24freerdp3.27.1-r0
rapidfort amazon linux 2023freerdp2:3.6.3-1.amzn2023.0.13
rapidfort amazon linux 2023freerdp-devel2:3.6.3-1.amzn2023.0.13
rapidfort amazon linux 2023freerdp-libs2:3.6.3-1.amzn2023.0.13
rapidfort amazon linux 2023freerdp-server2:3.6.3-1.amzn2023.0.13
rapidfort amazon linux 2023libwinpr2:3.6.3-1.amzn2023.0.13
rapidfort amazon linux 2023libwinpr-devel2:3.6.3-1.amzn2023.0.13
rapidfort debian 12freerdp2no fix listed
rapidfort debian 12freerdp30:3.27.0+dfsg-1
rapidfort debian 13freerdp2no fix listed
rapidfort debian 13freerdp30:3.27.0+dfsg-1
rapidfort fedora 43freerdp2:3.27.1-1.fc43
rapidfort fedora 43freerdp-devel2:3.27.1-1.fc43
rapidfort fedora 43freerdp-libs2:3.27.1-1.fc43
rapidfort fedora 43freerdp-server2:3.27.1-1.fc43
rapidfort fedora 43libwinpr2:3.27.1-1.fc43
rapidfort fedora 43libwinpr-devel2:3.27.1-1.fc43
rapidfort Oracle Linux 10freerdp2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 10freerdp-devel2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 10freerdp-libs2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 10freerdp-server2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 10libwinpr2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 10libwinpr-devel2:3.10.3-12.el10_2.10
rapidfort Oracle Linux 9freerdp2:2.11.7-7.el9_8.6
rapidfort Oracle Linux 9freerdp-devel2:2.11.7-7.el9_8.6
rapidfort Oracle Linux 9freerdp-libs2:2.11.7-7.el9_8.6
rapidfort Oracle Linux 9libwinpr2:2.11.7-7.el9_8.6
rapidfort Oracle Linux 9libwinpr-devel2:2.11.7-7.el9_8.6
rapidfort rocky 9freerdp2:2.11.7-7.el9_8.6
rapidfort rocky 9freerdp-libs2:2.11.7-7.el9_8.6
rapidfort rocky 9libwinpr2:2.11.7-7.el9_8.6
rocky 10freerdp2:3.10.3-12.el10_2.10
rocky 10freerdp-libs2:3.10.3-12.el10_2.10
rocky 10libwinpr2:3.10.3-12.el10_2.10
rocky 8freerdp2:2.11.7-12.el8_10
rocky 8freerdp-libs2:2.11.7-12.el8_10
rocky 8libwinpr2:2.11.7-12.el8_10
rocky 8libwinpr-devel2:2.11.7-12.el8_10
rocky 9freerdp2:2.11.7-7.el9_8.6
rocky 9freerdp-libs2:2.11.7-7.el9_8.6
rocky 9libwinpr2:2.11.7-7.el9_8.6
ubuntu 24.04freerdp33.30.0+dfsg-0ubuntu0.24.04.1
ubuntu 26.04freerdp33.30.0+dfsg-0ubuntu0.26.04.1

References

All 26 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.