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Vulnerabilities / CVE-2026-23531

critical

CVE-2026-23531

freerdp: FreeRDP: Heap buffer overflow via crafted RDPGFX surface updates leads to denial of service and potential code execution.

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 Hat7.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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 version 3.21.0, in ClearCodec, when `glyphData` is present, `clear_decompress` calls `freerdp_image_copy_no_overlap` without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

Affected packages and fixed versions

SourcePackageFixed in
alma 8freerdp, freerdp-devel, freerdp-libs and 2 more2:2.11.7-2.el8_10
alma 9freerdp, freerdp-devel, freerdp-libs and 2 more2:2.11.7-1.el9_7.1
alpine 3.23freerdp3.22.0-r0
alpine 3.24freerdp3.21.0-r0
alpine edgefreerdp3.21.0-r0
amazon linux 2freerdp, freerdp-debuginfo, freerdp-devel and 3 more2:2.11.7-1.amzn2.0.3
amazon linux 2023freerdp, freerdp-debuginfo, freerdp-debugsource and 8 more2:3.6.3-1.amzn2023.0.2
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp33.15.0+dfsg-2.1+deb13u1
debian 14freerdp33.21.0+dfsg-1
echofreerdp2, freerdp33.15.0+dfsg-2.1+deb13u1
Show all 110 entries from 33 sources
SourcePackageFixed in
alma 8freerdp2:2.11.7-2.el8_10
alma 8freerdp-devel2:2.11.7-2.el8_10
alma 8freerdp-libs2:2.11.7-2.el8_10
alma 8libwinpr2:2.11.7-2.el8_10
alma 8libwinpr-devel2:2.11.7-2.el8_10
alma 9freerdp2:2.11.7-1.el9_7.1
alma 9freerdp-devel2:2.11.7-1.el9_7.1
alma 9freerdp-libs2:2.11.7-1.el9_7.1
alma 9libwinpr2:2.11.7-1.el9_7.1
alma 9libwinpr-devel2:2.11.7-1.el9_7.1
alpine 3.23freerdp3.22.0-r0
alpine 3.24freerdp3.21.0-r0
alpine edgefreerdp3.21.0-r0
amazon linux 2freerdp2:2.11.7-1.amzn2.0.3
amazon linux 2freerdp-debuginfo2:2.11.7-1.amzn2.0.3
amazon linux 2freerdp-devel2:2.11.7-1.amzn2.0.3
amazon linux 2freerdp-libs2:2.11.7-1.amzn2.0.3
amazon linux 2libwinpr2:2.11.7-1.amzn2.0.3
amazon linux 2libwinpr-devel2:2.11.7-1.amzn2.0.3
amazon linux 2023freerdp2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-debuginfo2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-debugsource2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-devel2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-libs2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-libs-debuginfo2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-server2:3.6.3-1.amzn2023.0.2
amazon linux 2023freerdp-server-debuginfo2:3.6.3-1.amzn2023.0.2
amazon linux 2023libwinpr2:3.6.3-1.amzn2023.0.2
amazon linux 2023libwinpr-debuginfo2:3.6.3-1.amzn2023.0.2
amazon linux 2023libwinpr-devel2:3.6.3-1.amzn2023.0.2
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp33.15.0+dfsg-2.1+deb13u1
debian 14freerdp33.21.0+dfsg-1
echofreerdp2no fix listed
echofreerdp33.15.0+dfsg-2.1+deb13u1
Oracle Linux 7freerdp2.1.1-5.0.1.el7_9
Oracle Linux 7freerdp-devel2.1.1-5.0.1.el7_9
Oracle Linux 7freerdp-libs2.1.1-5.0.1.el7_9
Oracle Linux 7libwinpr2.1.1-5.0.1.el7_9
Oracle Linux 7libwinpr-devel2.1.1-5.0.1.el7_9
Oracle Linux 8freerdp2:2.11.7-2.el8_10
Oracle Linux 8freerdp-devel2:2.11.7-2.el8_10
Oracle Linux 8freerdp-libs2:2.11.7-2.el8_10
Oracle Linux 8libwinpr2:2.11.7-2.el8_10
Oracle Linux 8libwinpr-devel2:2.11.7-2.el8_10
Oracle Linux 9freerdp2:2.11.7-1.el9_7.1
Oracle Linux 9freerdp-devel2:2.11.7-1.el9_7.1
Oracle Linux 9freerdp-libs2:2.11.7-1.el9_7.1
Oracle Linux 9libwinpr2:2.11.7-1.el9_7.1
Oracle Linux 9libwinpr-devel2:2.11.7-1.el9_7.1
rapidfort alpine 3.20freerdp3.21.0-r0
rapidfort alpine 3.21freerdp3.21.0-r0
rapidfort alpine 3.22freerdp3.21.0-r0
rapidfort amazon linux 2023freerdp2:3.6.3-1.amzn2023.0.2
rapidfort amazon linux 2023freerdp-devel2:3.6.3-1.amzn2023.0.2
rapidfort amazon linux 2023freerdp-libs2:3.6.3-1.amzn2023.0.2
rapidfort amazon linux 2023freerdp-server2:3.6.3-1.amzn2023.0.2
rapidfort amazon linux 2023libwinpr2:3.6.3-1.amzn2023.0.2
rapidfort amazon linux 2023libwinpr-devel2:3.6.3-1.amzn2023.0.2
rapidfort debian 12freerdp2no fix listed
rapidfort debian 12freerdp30:3.15.0+dfsg-2.1+deb13u1, 0:3.21.0+dfsg-1
rapidfort debian 13freerdp2no fix listed
rapidfort debian 13freerdp30:3.15.0+dfsg-2.1+deb13u1, 0:3.21.0+dfsg-1
rapidfort fedora 43freerdp2:3.21.0-1.fc43
rapidfort fedora 43freerdp-devel2:3.21.0-1.fc43
rapidfort fedora 43freerdp-libs2:3.21.0-1.fc43
rapidfort fedora 43freerdp-server2:3.21.0-1.fc43
rapidfort fedora 43freerdp22.11.7-16.fc43
rapidfort fedora 43freerdp2-devel2.11.7-16.fc43
rapidfort fedora 43freerdp2-libs2.11.7-16.fc43
rapidfort fedora 43libwinpr2:3.21.0-1.fc43
rapidfort fedora 43libwinpr-devel2:3.21.0-1.fc43
rapidfort fedora 43libwinpr22.11.7-16.fc43
rapidfort fedora 43libwinpr2-devel2.11.7-16.fc43
rapidfort Oracle Linux 10freerdp2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10freerdp-devel2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10freerdp-libs2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10freerdp-server2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10freerdp2-devel2.11.7-7.el10_2
rapidfort Oracle Linux 10freerdp2-libs2.11.7-7.el10_2
rapidfort Oracle Linux 10libwinpr2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10libwinpr-devel2:3.10.3-5.el10_1.1
rapidfort Oracle Linux 10libwinpr22.11.7-7.el10_2
rapidfort Oracle Linux 10libwinpr2-devel2.11.7-7.el10_2
rapidfort Oracle Linux 9freerdp2:2.11.7-1.el9_7.1
rapidfort Oracle Linux 9freerdp-devel2:2.11.7-1.el9_7.1
rapidfort Oracle Linux 9freerdp-libs2:2.11.7-1.el9_7.1
rapidfort Oracle Linux 9libwinpr2:2.11.7-1.el9_7.1
rapidfort Oracle Linux 9libwinpr-devel2:2.11.7-1.el9_7.1
Red Hatfreerdpno fix listed
Red Hatfreerdp-develno fix listed
Red Hatfreerdp-libsno fix listed
Red Hatfreerdp-pluginsno fix listed
rocky 10freerdp2:3.10.3-5.el10_1.1
rocky 10freerdp-libs2:3.10.3-5.el10_1.1
rocky 10libwinpr2:3.10.3-5.el10_1.1
rocky 8freerdp2:2.11.7-2.el8_10
rocky 8freerdp-libs2:2.11.7-2.el8_10
rocky 8libwinpr2:2.11.7-2.el8_10
rocky 8libwinpr-devel2:2.11.7-2.el8_10
rocky 9freerdp2:2.11.7-1.el9_7.1
rocky 9freerdp-libs2:2.11.7-1.el9_7.1
rocky 9libwinpr2:2.11.7-1.el9_7.1
ubuntu 18.04-ESMfreerdp22.2.0+dfsg1-0ubuntu0.18.04.4+esm3
ubuntu 20.04-ESMfreerdp22.6.1+dfsg1-0ubuntu0.20.04.2+esm1
ubuntu 22.04freerdp22.6.1+dfsg1-3ubuntu2.8
ubuntu 24.04freerdp2no fix listed
ubuntu 24.04freerdp33.5.1+dfsg1-0ubuntu1.4
ubuntu 25.10freerdp33.16.0+dfsg-2ubuntu0.3

References

All 48 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.