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SUSE SLED15 / SLES15 Security Update : freerdp2 (SUSE-SU-2026:1640-1)

critical Nessus Plugin ID 311755

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1640-1 advisory.

 - CVE-2026-25941: Out-of-Bounds Read in client RDPGFX channel via crafted `WIRE_TO_SURFACE_2` PDU (bsc#1258919).
 - CVE-2026-25942: Global-buffer-overflow in `xf_rail_server_execute_result` (bsc#1258920).
 - CVE-2026-25952: Heap-use-after-free in `xf_SetWindowMinMaxInfo` (bsc#1258921).
 - CVE-2026-25953: Heap-use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258923).
 - CVE-2026-25954: Heap-use-after-free in `xf_rail_server_local_move_size` (bsc#1258924).
 - CVE-2026-25997: Heap-use-after-free in `xf_clipboard_format_equal` (bsc#1258977).
 - CVE-2026-26986: Heap-use-after-free in `rail_window_free` (bsc#1258967).
 - CVE-2026-27015: Smartcard NDR alignment padding triggers reachable `WINPR_ASSERT` abort (bsc#1258987).
 - CVE-2026-27951: Denial of Service via endless blocking loop in `Stream_EnsureCapacity` (bsc#1258939).
 - CVE-2026-29774: Missing bounds validation can cause a client-side heap buffer overflow (bsc#1259689).
 - CVE-2026-29775: Malicious server can trigger a client-side heap out-of-bounds access (bsc#1259684).
 - CVE-2026-29776: Missing length check can lead to an integer underflow (bsc#1259692).
 - CVE-2026-31897: Missing length check can cause an out-of-bounds read (bsc#1259693).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1259653

https://www.suse.com/security/cve/CVE-2026-31806

https://bugzilla.suse.com/1261848

https://bugzilla.suse.com/1258919

https://bugzilla.suse.com/1258920

https://bugzilla.suse.com/1258921

https://bugzilla.suse.com/1258923

https://bugzilla.suse.com/1258924

https://bugzilla.suse.com/1258939

https://bugzilla.suse.com/1258967

https://bugzilla.suse.com/1258977

https://bugzilla.suse.com/1258987

https://bugzilla.suse.com/1259680

https://bugzilla.suse.com/1259684

https://bugzilla.suse.com/1259689

https://bugzilla.suse.com/1259692

https://bugzilla.suse.com/1259693

https://www.suse.com/security/cve/CVE-2026-25941

https://www.suse.com/security/cve/CVE-2026-25942

https://www.suse.com/security/cve/CVE-2026-25952

https://www.suse.com/security/cve/CVE-2026-25953

https://www.suse.com/security/cve/CVE-2026-25954

https://www.suse.com/security/cve/CVE-2026-25997

https://www.suse.com/security/cve/CVE-2026-26986

https://www.suse.com/security/cve/CVE-2026-27015

https://www.suse.com/security/cve/CVE-2026-27951

https://www.suse.com/security/cve/CVE-2026-29774

https://www.suse.com/security/cve/CVE-2026-29775

https://www.suse.com/security/cve/CVE-2026-29776

https://www.suse.com/security/cve/CVE-2026-31884

https://www.suse.com/security/cve/CVE-2026-31897

http://www.nessus.org/u?43106ade

Plugin Details

Severity: Critical

ID: 311755

File Name: suse_SU-2026-1640-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/2/2026

Updated: 5/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-31806

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:freerdp2-server, p-cpe:/a:novell:suse_linux:freerdp2-proxy, p-cpe:/a:novell:suse_linux:libfreerdp2-2, p-cpe:/a:novell:suse_linux:libwinpr2-2, p-cpe:/a:novell:suse_linux:winpr2-devel, p-cpe:/a:novell:suse_linux:freerdp2, p-cpe:/a:novell:suse_linux:freerdp2-devel, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 2/25/2026

Reference Information

CVE: CVE-2026-25941, CVE-2026-25942, CVE-2026-25952, CVE-2026-25953, CVE-2026-25954, CVE-2026-25997, CVE-2026-26986, CVE-2026-27015, CVE-2026-27951, CVE-2026-29774, CVE-2026-29775, CVE-2026-29776, CVE-2026-31806, CVE-2026-31884, CVE-2026-31897

IAVA: 2026-A-0257-S, 2026-A-0286

SuSE: SUSE-SU-2026:1640-1