CVE-2026-23948
published 2026-02-09CVE-2026-23948: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.47%
37.9th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.22.0+dfsg-1 (forky) | freerdp3 3.22.0+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.22.0+dfsg-1 (forky) | freerdp3 3.22.0+dfsg-1 (forky) |
| freerdp | freerdp | < 3.22.0 | 3.22.0 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
osv6.9MEDIUM
vendor_ubuntu7.5HIGH
vendor_debian6.9MEDIUM
vendor_redhat6.9MEDIUM
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Ubuntu
FreeRDP vulnerabilities
vendor_ubuntu·2026-02-16·CVSS 7.5
CVE-2026-23948 [HIGH] FreeRDP vulnerabilities
Title: FreeRDP vulnerabilities
Summary: Several security issues were fixed in FreeRDP.
It was discovered that FreeRDP incorrectly handled memory under certain
circumstances, which could lead to a NULL pointer dereference. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2026-23948)
It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu
25.10. (CVE-2026-24491)
It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to c
Red Hat
freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
vendor_redhat·2026-02-09·CVSS 6.9
CVE-2026-23948 [MEDIUM] CWE-476 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
A null pointer dereference has been discovered in FreeRDP. A NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0.
Statement: Availability impact is limited to the FreeRDP instance on Red Hat Products. General system availability is not at risk.
Mi
Debian
CVE-2026-23948: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0...
vendor_debian·2026·CVSS 6.9
CVE-2026-23948 [MEDIUM] CVE-2026-23948: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0...
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
Scope: local
bookworm: open
bullseye: open
OSV
freerdp2, freerdp3 vulnerabilities
osv·2026-02-16·CVSS 6.9
CVE-2026-23948 [MEDIUM] freerdp2, freerdp3 vulnerabilities
freerdp2, freerdp3 vulnerabilities
It was discovered that FreeRDP incorrectly handled memory under certain
circumstances, which could lead to a NULL pointer dereference. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2026-23948)
It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. This issue only affected FreeRDP3 in Ubuntu 24.04 LTS and Ubuntu
25.10. (CVE-2026-24491)
It was discovered that FreeRDP did not correctly validate the size of
certain variables, which could cause a buffer overflow. An attacker could
possibly use this issue to cause a denial of service or execute arbitrary
code. (
OSV
CVE-2026-23948: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-02-09·CVSS 6.9
CVE-2026-23948 [MEDIUM] CVE-2026-23948: FreeRDP is a free implementation of the Remote Desktop Protocol
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-23948 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 6.9
CVE-2026-23948 [MEDIUM] CVE-2026-23948 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23948 :
NixOS vulnerability analysis and mitigation
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
Source : NVD
## 6.9
Score
Published February 9, 2026
Severity MEDIUM
CNA Score 6.9
Affected Technologies
NixOS
Alma Linux
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 5.2
Exploitation Probability (EPSS) N/A
Affected packages and libraries
libwinpr-devel
libuwac0-0
Sources
NVD
AlmaLinux 9 Severi
Bugzilla
CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
bugzilla·2026-02-09·CVSS 6.9
CVE-2026-23948 [MEDIUM] CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:6340 https://access.redhat.com/errata/RHSA-2026:6340
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9.6 Extended Update Support
Via RHSA-2026:6727 https://access.redhat.com/errata/RHSA-2026:6727
---
This issue has been addre
Bugzilla
CVE-2026-23948 freerdp2: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() [fedora-42]
bugzilla·2026-02-09·CVSS 6.9
CVE-2026-23948 [MEDIUM] CVE-2026-23948 freerdp2: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() [fedora-42]
CVE-2026-23948 freerdp2: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained v
2026-02-09
Published