FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane… (CVE-2026-85090)
FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.
AI Analysis
Technical Summary
CVE-2026-85090 describes a heap out-of-bounds read vulnerability in FreeRDP prior to version 3.31.0. The issue occurs in the general_ChromaV1ToYUV444 function during the reconstruction of AVC444 chroma planes. A malicious RDP server can exploit this by sending a specially crafted RFX_AVC444_BITMAP_STREAM with specific frame geometry, causing FreeRDP to read memory beyond the allocated luma plane buffer. This can lead to information disclosure or application instability. The vulnerability affects multiple specific versions of FreeRDP, including various Ubuntu package versions. A patch is available to fix this vulnerability.
Potential Impact
The vulnerability allows a remote attacker controlling an RDP server to cause FreeRDP clients to perform out-of-bounds memory reads. This can lead to partial information disclosure and potentially cause application crashes or instability. The CVSS 3.1 base score is 5.4 (medium severity), reflecting a network attack vector with low complexity, no privileges required, but requiring user interaction.
Mitigation Recommendations
A patch is available for this vulnerability. Users and administrators should upgrade FreeRDP to version 3.31.0 or later to remediate the issue. Applying the official vendor patches or updated packages from trusted sources is recommended. No additional mitigation actions are specified or required beyond applying the fix.
FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane… (CVE-2026-85090)
Description
FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.
CVSS v3.1
Score 5.4medium
Affected software
pkg:deb/ubuntu/freerdp?arch=source&distro=xenialpkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/freerdp?arch=source&distro=bionicpkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/freerdp2?arch=source&distro=jammypkg:deb/ubuntu/freerdp3?arch=source&distro=noblepkg:deb/ubuntu/freerdp2?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/freerdp3?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85090 describes a heap out-of-bounds read vulnerability in FreeRDP prior to version 3.31.0. The issue occurs in the general_ChromaV1ToYUV444 function during the reconstruction of AVC444 chroma planes. A malicious RDP server can exploit this by sending a specially crafted RFX_AVC444_BITMAP_STREAM with specific frame geometry, causing FreeRDP to read memory beyond the allocated luma plane buffer. This can lead to information disclosure or application instability. The vulnerability affects multiple specific versions of FreeRDP, including various Ubuntu package versions. A patch is available to fix this vulnerability.
Potential Impact
The vulnerability allows a remote attacker controlling an RDP server to cause FreeRDP clients to perform out-of-bounds memory reads. This can lead to partial information disclosure and potentially cause application crashes or instability. The CVSS 3.1 base score is 5.4 (medium severity), reflecting a network attack vector with low complexity, no privileges required, but requiring user interaction.
Mitigation Recommendations
A patch is available for this vulnerability. Users and administrators should upgrade FreeRDP to version 3.31.0 or later to remediate the issue. Applying the official vendor patches or updated packages from trusted sources is recommended. No additional mitigation actions are specified or required beyond applying the fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-85090
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6aa47ebf55bf5e2cf58579e5
Added to database: 09/11/2026, 22:20:47 UTC
Last enriched: 09/11/2026, 22:48:19 UTC
Last updated: 09/12/2026, 01:19:12 UTC
Views: 4
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