Vulnerabilities
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CVE Vulnerabilities

CVE-2026-23948

NULL Pointer Dereference

Published: Feb 09, 2026 | Modified: Feb 10, 2026
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
5.3 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-23948
CWEhttps://cwe.mitre.org/data/definitions/476.html

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.

Weakness

The product dereferences a pointer that it expects to be valid but is NULL.

Affected Software

NameVendorStart VersionEnd Version
FreerdpFreerdp*3.22.0 (excluding)
Red Hat Enterprise Linux 10RedHatfreerdp-2:3.10.3-5.el10_1.5*
Red Hat Enterprise Linux 10RedHatfreerdp-2:3.10.3-12.el10_2.2*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatfreerdp-2:3.10.3-3.el10_0.5*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatfreerdp-0:2.1.1-5.el7_9.7*
Red Hat Enterprise Linux 8RedHatfreerdp-2:2.11.7-6.el8_10*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatfreerdp-2:2.0.0-46.rc4.el8_2.10*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatfreerdp-2:2.2.0-12.el8_4*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatfreerdp-2:2.2.0-12.el8_4*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatfreerdp-2:2.2.0-7.el8_6.5*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatfreerdp-2:2.2.0-7.el8_6.5*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatfreerdp-2:2.2.0-7.el8_6.5*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatfreerdp-2:2.2.0-12.el8_8.5*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatfreerdp-2:2.2.0-12.el8_8.5*
Red Hat Enterprise Linux 9RedHatfreerdp-2:2.11.7-1.el9_7.5*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatfreerdp-2:2.4.1-3.el9_0.4*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatfreerdp-2:2.4.1-6.el9_2.6*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatfreerdp-2:2.11.2-1.el9_4.5*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatfreerdp-2:2.11.7-1.el9_6.7*
FreerdpUbuntuesm-infra/xenial*
Freerdp2Ubuntuesm-apps/noble*
Freerdp2Ubuntuesm-infra/bionic*
Freerdp2Ubuntuesm-infra/focal*
Freerdp2Ubuntujammy*
Freerdp2Ubuntunoble*
Freerdp3Ubuntunoble*
Freerdp3Ubuntuquesting*

Potential Mitigations

References

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