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Vulnerabilities / CVE-2026-63633

critical

CVE-2026-63633

freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in Opus audio decode

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 3.28.0, freerdp_dsp_decode_opus in libfreerdp/codec/dsp.c calls Stream_EnsureRemainingCapacity on context->common.buffer even though opus_decode writes decoded PCM into the caller-supplied out stream. A malicious RDP server that negotiates WAVE_FORMAT_OPUS with a client built with WITH_OPUS enabled and WITH_DSP_FFMPEG disabled can make libopus write a large decoded frame beyond the 4096-byte StreamPool_Take destination used by channels/rdpsnd/client/rdpsnd_main.c. This can corrupt the client heap, crash the client, and may permit code execution. This issue is fixed in version 3.28.0.

Affected packages and fixed versions

SourcePackageFixed in
alma 10freerdp, freerdp-devel, freerdp-libs and 3 more2:3.10.3-12.el10_2.10
amazon linux 2023freerdp, freerdp-debuginfo, freerdp-debugsource and 8 more2:3.31.0-1.amzn2023
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp3no fix listed
debian 14freerdp33.28.0+dfsg-1
echofreerdp2, freerdp3no fix listed
rapidfort alma 10freerdp, freerdp-devel, freerdp-libs and 3 more2:3.10.3-12.el10_2.10
rapidfort alpine 3.20freerdp3.29.0-r0
rapidfort alpine 3.21freerdp3.29.0-r0
rapidfort alpine 3.22freerdp3.29.0-r0
rapidfort alpine 3.23freerdp3.29.0-r0
Show all 61 entries from 21 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
amazon linux 2023freerdp2:3.31.0-1.amzn2023
amazon linux 2023freerdp-debuginfo2:3.31.0-1.amzn2023
amazon linux 2023freerdp-debugsource2:3.31.0-1.amzn2023
amazon linux 2023freerdp-devel2:3.31.0-1.amzn2023
amazon linux 2023freerdp-libs2:3.31.0-1.amzn2023
amazon linux 2023freerdp-libs-debuginfo2:3.31.0-1.amzn2023
amazon linux 2023freerdp-server2:3.31.0-1.amzn2023
amazon linux 2023freerdp-server-debuginfo2:3.31.0-1.amzn2023
amazon linux 2023libwinpr2:3.31.0-1.amzn2023
amazon linux 2023libwinpr-debuginfo2:3.31.0-1.amzn2023
amazon linux 2023libwinpr-devel2:3.31.0-1.amzn2023
debian 11freerdp2no fix listed
debian 12freerdp2no fix listed
debian 13freerdp3no fix listed
debian 14freerdp33.28.0+dfsg-1
echofreerdp2no fix listed
echofreerdp3no fix listed
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 alpine 3.20freerdp3.29.0-r0
rapidfort alpine 3.21freerdp3.29.0-r0
rapidfort alpine 3.22freerdp3.29.0-r0
rapidfort alpine 3.23freerdp3.29.0-r0
rapidfort alpine 3.24freerdp3.29.0-r0
rapidfort amazon linux 2023freerdp2:3.31.0-1.amzn2023
rapidfort amazon linux 2023freerdp-devel2:3.31.0-1.amzn2023
rapidfort amazon linux 2023freerdp-libs2:3.31.0-1.amzn2023
rapidfort amazon linux 2023freerdp-server2:3.31.0-1.amzn2023
rapidfort amazon linux 2023libwinpr2:3.31.0-1.amzn2023
rapidfort amazon linux 2023libwinpr-devel2:3.31.0-1.amzn2023
rapidfort debian 12freerdp2no fix listed
rapidfort debian 12freerdp30:3.28.0+dfsg-1
rapidfort debian 13freerdp2no fix listed
rapidfort debian 13freerdp30:3.28.0+dfsg-1
rapidfort fedora 43freerdp2:3.28.0-1.fc43
rapidfort fedora 43freerdp-devel2:3.28.0-1.fc43
rapidfort fedora 43freerdp-libs2:3.28.0-1.fc43
rapidfort fedora 43freerdp-server2:3.28.0-1.fc43
rapidfort fedora 43libwinpr2:3.28.0-1.fc43
rapidfort fedora 43libwinpr-devel2:3.28.0-1.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
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
ubuntu 24.04freerdp33.30.0+dfsg-0ubuntu0.24.04.1
ubuntu 26.04freerdp33.30.0+dfsg-0ubuntu0.26.04.1

References

All 52 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.