CVE-2026-110839

FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4	Exploit Vendor Advisory Mitigation
https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data	Third Party Advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4	Exploit Vendor Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

History

23 Oct 2026, 20:55

Type	Values Removed	Values Added
References	~~() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 -~~	() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 - Exploit, Vendor Advisory, Mitigation
References	~~() https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data -~~	() https://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data - Third Party Advisory
CPE		cpe:2.3:a:freerdp:freerdp::::::::
First Time		Freerdp Freerdp freerdp

15 Oct 2026, 16:17

Type	Values Removed	Values Added
References	~~() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 -~~	() https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4 -

14 Oct 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-14 23:17

Updated : 2026-10-23 20:55

NVD link : CVE-2026-110839

Mitre link : CVE-2026-110839

CVE.ORG link : CVE-2026-110839

JSON object : View

Products Affected

freerdp

freerdp

CWE

CWE-787

Out-of-bounds Write

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