Name: CVE-2026-91946: Use of Uninitialized Resource
Creator: Rapid7
Published: 2026-09-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-91946, CWE-908, CVSS 6.5, EPSS 0.00529

FreeRDP versions before 3.31.0 contain an information disclosure vulnerability in the RDPGFX server's ResetGraphics PDU serializer that fails to initialize padding bytes in the fixed 340-byte wire format. Attackers can receive uninitialized heap memory including live pointers and GLib function addresses transmitted in the PDU, defeating heap ASLR and disclosing the GLib module base address.

CVSS Details

CVSS 4.0 Base Score: 7.1 (HIGH)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 6.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Amazon Linux Ami 2	—	Upgrade freerdpUpgrade freerdp-debuginfoUpgrade freerdp-libsUpgrade freerdp-develUpgrade libwinpr-develUpgrade libwinpr	Oct 19, 2026	Oct 19, 2026
Amazon_linux_2023	—	Upgrade freerdp-serverUpgrade freerdp-libsUpgrade freerdp-libs-debuginfoUpgrade libwinpr-debuginfoUpgrade freerdp-debuginfoUpgrade freerdp-debugsourceUpgrade freerdp-develUpgrade libwinpr-develUpgrade freerdpUpgrade libwinprUpgrade freerdp-server-debuginfo	Sep 30, 2026	Sep 15, 2026
Oracle_linux	—	Upgrade freerdp-serverUpgrade freerdp-develUpgrade freerdp-libsUpgrade libwinprUpgrade freerdpUpgrade libwinpr-devel	Oct 22, 2026	Sep 15, 2026
Redhat_linux	—	Upgrade freerdp-debuginfoUpgrade libwinpr-develUpgrade freerdp-debugsourceUpgrade freerdp-server-debuginfoUpgrade freerdpUpgrade freerdp-libsNo solution existsUpgrade libwinprUpgrade freerdp-develUpgrade freerdp-libs-debuginfoUpgrade libwinpr-debuginfoUpgrade freerdp-server	Sep 17, 2026	Sep 15, 2026
Rocky_linux	—	Upgrade freerdp-server-debuginfoUpgrade freerdp-libs-debuginfoUpgrade libwinprUpgrade freerdp-serverUpgrade freerdp-libsUpgrade freerdp-develUpgrade libwinpr-debuginfoUpgrade freerdp-debugsourceUpgrade libwinpr-develUpgrade freerdp-debuginfoUpgrade freerdp	Oct 8, 2026	Oct 6, 2026
Ubuntu	—	Upgrade freerdp3	Sep 22, 2026	Sep 16, 2026

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CVSS Details

Covered by Rapid7

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