CVE-2026-23948 — NULL Pointer Dereference in Freerdp

CWE-476 — NULL Pointer Dereference8 documents7 sources
Severity
6.9MEDIUMNVD
EPSS
0.0%
top 94.60%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
FreerdpDebian Freerdp2Debian Freerdp3
Timeline
PublishedFeb 9
Latest updateFeb 16

Description

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.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected Packages3 packages

▶NVDfreerdp/freerdp< 3.22.0
▶debiandebian/freerdp2< freerdp3 3.22.0+dfsg-1 (forky)
▶debiandebian/freerdp3< freerdp3 3.22.0+dfsg-1 (forky)

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
OSV
freerdp2, freerdp3 vulnerabilities↗2026-02-16
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OSV
CVE-2026-23948: FreeRDP is a free implementation of the Remote Desktop Protocol↗2026-02-09
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📋Vendor Advisories

3
Ubuntu
FreeRDP vulnerabilities↗2026-02-16
▶
Red Hat
freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()↗2026-02-09
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Debian
CVE-2026-23948: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-23948 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()↗2026-02-09
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