CVE-2026-91946

FreeRDP before 3.31.0 Information Disclosure via RDPGFX ResetGraphics

7.1 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.53%Up 0.1 points since Sep 16, 2026

What each source reports

CVE List Score used 7.1

FreeRDP before 3.31.0 Information Disclosure via RDPGFX ResetGraphics

Record: CVE-2026-91946
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-908
Updated: 2026-11-02

EUVDEUVD-2026-78803 7.1

Record: EUVD-2026-78803
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gw8v-xq42-vg69 7.1

FreeRDP versions before 3.31.0 contain an information disclosure vulnerability in the RDPGFX...

Record: GHSA-gw8v-xq42-vg69
CVSS 4.0: 7.1 HighCVSS: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: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-908
Updated: 2026-11-02

NVD 7.1

Record: CVE-2026-91946
CVSS 4.0: 7.1 HighCVSS: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: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-908
Updated: 2026-11-02

OSV 7.1

FreeRDP before 3.31.0 Information Disclosure via RDPGFX ResetGraphics

Record: CVE-2026-91946
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-908
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-91946 7.1

Record: DEBIAN-CVE-2026-91946
CVSS 4.0: 7.1 HighCVSS: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
Updated: 2026-11-02

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OSVRHSA-2026:75570 8.8

Red Hat Security Advisory: freerdp security update

Record: RHSA-2026:75570
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVRLSA-2026:75570 8.8

Important: freerdp security update

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

FreeRDP: freerdp-proxy: FreeRDP: Information disclosure via uninitialized heap memory in Save Session Info PDU (CVE-2026-85089)
FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command (CVE-2026-91954)
FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU (CVE-2026-91964)
FreeRDP: FreeRDP: Information Disclosure via RDPGFX ResetGraphics PDU (CVE-2026-91946)
FreeRDP: FreeRDP: Denial of Service via out-of-bounds read in URBDRC channel (CVE-2026-91956)
FreeRDP: FreeRDP: Remote code execution via uninitialized heap memory disclosure (CVE-2026-91963)
FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption (CVE-2026-91947)
FreeRDP: FreeRDP: Denial of Service due to buffer over-read in RPC gateway (CVE-2026-91959)
FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service or information disclosure (CVE-2026-91950)
FreeRDP: FreeRDP: Denial of Service via integer overflow and double free in WinPR (CVE-2026-91960)
FreeRDP: FreeRDP: Heap buffer overflow via oversized LB_LOAD_BALANCE_INFO routing token can lead to heap corruption. (CVE-2026-91953)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record: RLSA-2026:75570
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-91946 7.1

Record: UBUNTU-CVE-2026-91946
CVSS 4.0: 7.1 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVALSA-2026:75570 No score

Important: freerdp security update

Security Fix(es):

FreeRDP: freerdp-proxy: FreeRDP: Information disclosure via uninitialized heap memory in Save Session Info PDU (CVE-2026-85089)
FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command (CVE-2026-91954)
FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU (CVE-2026-91964)
FreeRDP: FreeRDP: Information Disclosure via RDPGFX ResetGraphics PDU (CVE-2026-91946)
FreeRDP: FreeRDP: Denial of Service via out-of-bounds read in URBDRC channel (CVE-2026-91956)
FreeRDP: FreeRDP: Remote code execution via uninitialized heap memory disclosure (CVE-2026-91963)
FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption (CVE-2026-91947)
FreeRDP: FreeRDP: Denial of Service due to buffer over-read in RPC gateway (CVE-2026-91959)
FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service or information disclosure (CVE-2026-91950)
FreeRDP: FreeRDP: Denial of Service via integer overflow and double free in WinPR (CVE-2026-91960)
FreeRDP: FreeRDP: Heap buffer overflow via oversized LB_LOAD_BALANCE_INFO routing token can lead to heap corruption. (CVE-2026-91953)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record: ALSA-2026:75570
Updated: 2026-11-02

Affected products

freerdp

Affected packages

Affected packages
Package	Affected	Fixed
`freerdp` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-devel` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-libs` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-server` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`libwinpr` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`libwinpr-devel` AlmaLinux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp2` Debian:12	All versions, plus listed versions 2.10.0+dfsg1-12.10.0+dfsg1-1.12.11.2+dfsg1-12.11.2+dfsg1-1.1~exp12.11.2+dfsg1-1.1~exp2 Show 8 moreShow less 2.11.5+dfsg1-12.11.7+dfsg1-12.11.7+dfsg1-22.11.7+dfsg1-32.11.7+dfsg1-42.11.7+dfsg1-52.11.7+dfsg1-62.11.7+dfsg1-6~deb12u1	None known
`freerdp3` Debian:13	All versions, plus listed versions 3.15.0+dfsg-2.13.15.0+dfsg-2.1+deb13u13.15.0+dfsg-2.1+deb13u23.15.0+dfsg-2.1+deb13u33.16.0+dfsg-1 Show 42 moreShow less 3.16.0+dfsg-23.17.0+dfsg-13.17.1+dfsg-13.17.1+dfsg-23.17.2+dfsg-13.17.2+dfsg-23.17.2+dfsg-33.18.0+dfsg-13.19.0+dfsg-13.19.1+dfsg-13.20.0+dfsg-13.20.2+dfsg-13.21.0+dfsg-13.22.0+dfsg-13.22.0+dfsg-1~bpo13+03.22.0+dfsg-1~bpo13+13.22.0+dfsg-33.23.0+dfsg-13.23.0+dfsg-1~bpo13+13.24.0+dfsg-13.24.0+dfsg-23.24.1+dfsg-13.24.2+dfsg-13.24.2+dfsg-1~bpo13+13.25.0+dfsg-13.25.0+dfsg-23.25.0+dfsg-33.25.0+dfsg-43.25.0+dfsg-53.26.0+dfsg-13.26.0+dfsg-1~bpo13+13.27.0+dfsg-13.27.1+dfsg-13.28.0+dfsg-13.28.0+dfsg-23.29.0+dfsg-13.30.0+dfsg-13.30.0+dfsg-1~bpo13+13.31.0+dfsg-13.31.1+dfsg-13.31.1+dfsg-1~bpo13+13.32.0+dfsg-1	None known
`freerdp3` Debian:14	before 3.31.0+dfsg-1, plus listed versions 3.15.0+dfsg-2.13.16.0+dfsg-13.16.0+dfsg-23.17.0+dfsg-13.17.1+dfsg-1 Show 35 moreShow less 3.17.1+dfsg-23.17.2+dfsg-13.17.2+dfsg-23.17.2+dfsg-33.18.0+dfsg-13.19.0+dfsg-13.19.1+dfsg-13.20.0+dfsg-13.20.2+dfsg-13.21.0+dfsg-13.22.0+dfsg-13.22.0+dfsg-1~bpo13+03.22.0+dfsg-1~bpo13+13.22.0+dfsg-33.23.0+dfsg-13.23.0+dfsg-1~bpo13+13.24.0+dfsg-13.24.0+dfsg-23.24.1+dfsg-13.24.2+dfsg-13.24.2+dfsg-1~bpo13+13.25.0+dfsg-13.25.0+dfsg-23.25.0+dfsg-33.25.0+dfsg-43.25.0+dfsg-53.26.0+dfsg-13.26.0+dfsg-1~bpo13+13.27.0+dfsg-13.27.1+dfsg-13.28.0+dfsg-13.28.0+dfsg-23.29.0+dfsg-13.30.0+dfsg-13.30.0+dfsg-1~bpo13+1	3.31.0+dfsg-1
`freerdp` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14

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Affected packages
Package	Affected	Fixed
`freerdp-debuginfo` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-debugsource` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-libs` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-libs-debuginfo` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-server-debuginfo` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`libwinpr` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`libwinpr-debuginfo` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-devel` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp-server` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`libwinpr-devel` Red Hat:enterprise_linux:10.2 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp` Rocky Linux:10 From an advisory covering 11 CVEs	before 2:3.10.3-12.el10_2.14	2:3.10.3-12.el10_2.14
`freerdp` Ubuntu:16.04:LTS	All versions, plus listed versions 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu11.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.21.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.31.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4	None known
`freerdp2` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 2.0.0~git20170725.1.1648deb+dfsg1-12.0.0~git20170725.1.1648deb+dfsg1-52.0.0~git20170725.1.1648deb+dfsg1-5ubuntu12.0.0~git20170725.1.1648deb+dfsg1-5ubuntu22.0.0~git20170725.1.1648deb+dfsg1-6 Show 14 moreShow less 2.0.0~git20170725.1.1648deb+dfsg1-6build12.0.0~git20170725.1.1648deb+dfsg1-72.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.12.1.1+dfsg1-0ubuntu0.18.04.12.2.0+dfsg1-0ubuntu0.18.04.12.2.0+dfsg1-0ubuntu0.18.04.22.2.0+dfsg1-0ubuntu0.18.04.32.2.0+dfsg1-0ubuntu0.18.04.42.2.0+dfsg1-0ubuntu0.18.04.4+esm12.2.0+dfsg1-0ubuntu0.18.04.4+esm22.2.0+dfsg1-0ubuntu0.18.04.4+esm32.2.0+dfsg1-0ubuntu0.18.04.4+esm42.2.0+dfsg1-0ubuntu0.18.04.4+esm52.2.0+dfsg1-0ubuntu0.18.04.4+esm6	None known
`freerdp` Ubuntu:18.04:LTS	All versions, plus listed versions 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu11.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.11.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2	None known
`freerdp2` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 2.0.0~git20190204.1.2693389a+dfsg1-12.0.0~git20190204.1.2693389a+dfsg1-22.0.0~git20190204.1.2693389a+dfsg1-2build12.0.0~git20190204.1.2693389a+dfsg1-2build22.1.1+dfsg1-0ubuntu0.20.04.1 Show 12 moreShow less 2.2.0+dfsg1-0ubuntu0.20.04.12.2.0+dfsg1-0ubuntu0.20.04.22.2.0+dfsg1-0ubuntu0.20.04.32.2.0+dfsg1-0ubuntu0.20.04.42.2.0+dfsg1-0ubuntu0.20.04.52.2.0+dfsg1-0ubuntu0.20.04.62.6.1+dfsg1-0ubuntu0.20.04.12.6.1+dfsg1-0ubuntu0.20.04.22.6.1+dfsg1-0ubuntu0.20.04.2+esm12.6.1+dfsg1-0ubuntu0.20.04.2+esm22.6.1+dfsg1-0ubuntu0.20.04.2+esm32.6.1+dfsg1-0ubuntu0.20.04.2+esm4	None known
`freerdp2` Ubuntu:22.04:LTS	All versions, plus listed versions 2.3.0+dfsg1-2build12.3.0+dfsg1-2ubuntu12.3.0+dfsg1-2ubuntu22.4.1+dfsg1-12.4.1+dfsg1-1ubuntu1 Show 18 moreShow less 2.4.1+dfsg1-1ubuntu22.5.0+dfsg1-12.6.0+dfsg1-12.6.1+dfsg1-12.6.1+dfsg1-32.6.1+dfsg1-3ubuntu12.6.1+dfsg1-3ubuntu22.6.1+dfsg1-3ubuntu2.12.6.1+dfsg1-3ubuntu2.22.6.1+dfsg1-3ubuntu2.32.6.1+dfsg1-3ubuntu2.42.6.1+dfsg1-3ubuntu2.52.6.1+dfsg1-3ubuntu2.62.6.1+dfsg1-3ubuntu2.72.6.1+dfsg1-3ubuntu2.82.6.1+dfsg1-3ubuntu2.92.6.1+dfsg1-3ubuntu2.102.6.1+dfsg1-3ubuntu2.11	None known
`freerdp3` Ubuntu:24.04:LTS	before 3.31.0+dfsg-0ubuntu0.24.04.1, plus listed versions 3.4.0+dfsg1-0ubuntu23.4.0+dfsg1-0ubuntu33.4.0+dfsg1-0ubuntu43.5.0+dfsg1-0ubuntu13.5.1+dfsg1-0ubuntu1 Show 7 moreShow less 3.5.1+dfsg1-0ubuntu1.13.5.1+dfsg1-0ubuntu1.23.5.1+dfsg1-0ubuntu1.43.5.1+dfsg1-0ubuntu1.53.5.1+dfsg1-0ubuntu1.63.30.0+dfsg-0ubuntu0.24.04.13.30.0+dfsg-0ubuntu0.24.04.2	3.31.0+dfsg-0ubuntu0.24.04.1
`freerdp2` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 2.10.0+dfsg1-1.1ubuntu12.11.2+dfsg1-12.11.2+dfsg1-1build12.11.2+dfsg1-1build32.11.5+dfsg1-1build1 Show 7 moreShow less 2.11.5+dfsg1-1build22.11.5+dfsg1-1ubuntu0.1~esm12.11.5+dfsg1-1ubuntu0.1~esm22.11.5+dfsg1-1ubuntu0.1~esm32.11.5+dfsg1-1ubuntu0.1~esm42.11.5+dfsg1-1ubuntu0.1~esm52.11.5+dfsg1-1ubuntu0.1~esm6	None known
`freerdp3` Ubuntu:26.04:LTS	before 3.31.0+dfsg-0ubuntu0.26.04.1, plus listed versions 3.16.0+dfsg-23.18.0+dfsg-1ubuntu13.19.0+dfsg-13.19.1+dfsg-13.20.0+dfsg-1 Show 8 moreShow less 3.20.2+dfsg-13.21.0+dfsg-13.22.0+dfsg-13.24.1+dfsg-1ubuntu13.24.2+dfsg-1ubuntu13.24.2+dfsg-1ubuntu1.13.30.0+dfsg-0ubuntu0.26.04.13.30.0+dfsg-0ubuntu0.26.04.2	3.31.0+dfsg-0ubuntu0.26.04.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-91946 is a high vulnerability (CVSS 7.1) in Freerdp, published September 15, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. Fixed in freerdp3 3.31.0+dfsg-1.

References

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