CVE-2026-27015
published 2026-02-25CVE-2026-27015: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()`…
PriorityP434medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.26%
17.1th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.23.0+dfsg-1 (forky) | freerdp3 3.23.0+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.23.0+dfsg-1 (forky) | freerdp3 3.23.0+dfsg-1 (forky) |
| freerdp | freerdp | < 3.23.0 | 3.23.0 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
nvdv4.05.0MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/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
osv5.0MEDIUM
vendor_debian5.0MEDIUM
vendor_redhat5.0MEDIUM
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Ubuntu
FreeRDP vulnerabilities
vendor_ubuntu·2026-03-18
CVE-2026-25954 FreeRDP vulnerabilities
Title: FreeRDP vulnerabilities
Summary: Several security issues were fixed in FreeRDP.
It was discovered that FreeRDP incorrectly handled certain RDP packets. A
remote attacker could use this issue to cause FreeRDP to crash, resulting
in a denial of service, or possibly execute arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
vendor_redhat·2026-02-25·CVSS 5.0
CVE-2026-27015 [MEDIUM] CWE-120 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. A malicious Remote Desktop Protoc
Debian
CVE-2026-27015: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
vendor_debian·2026·CVSS 5.0
CVE-2026-27015 [MEDIUM] CVE-2026-27015: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
Scope: local
bookworm: open
bullseye: open
VulDB
FreeRDP up to 3.22.x smartcard_pack.c smartcard_unpack_read_size_align assertion (GHSA-7g72-39pq-4725 / Nessus ID 300124)
vuldb·2026-05-14·CVSS 5.0
CVE-2026-27015 [MEDIUM] FreeRDP up to 3.22.x smartcard_pack.c smartcard_unpack_read_size_align assertion (GHSA-7g72-39pq-4725 / Nessus ID 300124)
A vulnerability classified as critical was found in FreeRDP up to 3.22.x. Impacted is the function smartcard_unpack_read_size_align of the file libfreerdp/utils/smartcard_pack.c. Such manipulation leads to reachable assertion.
This vulnerability is listed as CVE-2026-27015. The attack may be performed from remote. There is no available exploit.
Upgrading the affected component is advised.
OSV
CVE-2026-27015: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-02-25·CVSS 5.0
CVE-2026-27015 [MEDIUM] CVE-2026-27015: FreeRDP is a free implementation of the Remote Desktop Protocol
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
bugzilla·2026-02-25·CVSS 6.5
CVE-2026-27015 [MEDIUM] CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` → `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.
Bugzilla
CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [fedora-42]
bugzilla·2026-02-25·CVSS 5.0
CVE-2026-27015 [MEDIUM] CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [fedora-42]
CVE-2026-27015 freerdp: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [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 bug is already fixed in a published Bodhi update.
---
FEDORA-2026-53fe996a57 (freerdp-3.23.0-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-53fe996a57
Bugzilla
CVE-2026-27015 freerdp2: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [fedora-42]
bugzilla·2026-02-25·CVSS 5.0
CVE-2026-27015 [MEDIUM] CVE-2026-27015 freerdp2: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [fedora-42]
CVE-2026-27015 freerdp2: FreeRDP: Denial of Service via missing bounds check in smartcard redirection [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 mai
Wiz
CVE-2026-27015 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.0
CVE-2026-27015 [MEDIUM] CVE-2026-27015 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-27015 :
NixOS vulnerability analysis and mitigation
smartcard_unpack_read_size_align()
libfreerdp/utils/smartcard_pack.c:1703
WINPR_ASSERT
abort()
WITH_VERBOSE_WINPR_ASSERT=ON
xfreerdp /smartcard
/smartcard-logon
/smartcard
Source : NVD
## 5
Score
Published February 25, 2026
Severity MEDIUM
CNA Score 5.0
Affected Technologies
NixOS
Wolfi
Has Public Exploit Yes
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 12.8
Exploitation Probability (EPSS) N/A
Affected packages and libraries
freerdp
freerdp-libs
Sources
NVD
Alpine 3.10, 3.11, 3.12, 3.13, 3.14, 3.15, 3.16, 3.17, 3.18, 3.19, 3.20, 3.21, 3.22 Severity MEDIUM No Fix Added at: Mar 02, 2026
Chainguard Has Fix Added at: Mar 02, 2026
2026-02-25
Published