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AlmaLinux 9 : freerdp (ALSA-2026:6340)

critical Nessus Plugin ID 304739

Synopsis

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

Description

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:6340 advisory.

 * freerdp: FreeRDP heap-use-after-free (CVE-2026-22856)
 * freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)
 * freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)
 * freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)
 * freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)
 * freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)
 * freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)
 * freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)
 * freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)
 * freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)
 * freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)
 * freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)
 * freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://access.redhat.com/errata/RHSA-2026:6340

https://errata.almalinux.org/9/ALSA-2026-6340.html

Plugin Details

Severity: Critical

ID: 304739

File Name: alma_linux_ALSA-2026-6340.nasl

Version: 1.2

Type: Local

Published: 4/3/2026

Updated: 4/3/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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: cpe:/o:alma:linux:9::highavailability, cpe:/o:alma:linux:9::resilientstorage, p-cpe:/a:alma:linux:freerdp-devel, p-cpe:/a:alma:linux:libwinpr-devel, p-cpe:/a:alma:linux:libwinpr, cpe:/o:alma:linux:9::appstream, cpe:/o:alma:linux:9, cpe:/o:alma:linux:9::realtime, cpe:/o:alma:linux:9::sap_hana, cpe:/o:alma:linux:9::supplementary, p-cpe:/a:alma:linux:freerdp, cpe:/o:alma:linux:9::sap, cpe:/o:alma:linux:9::crb, cpe:/o:alma:linux:9::nfv, p-cpe:/a:alma:linux:freerdp-libs, cpe:/o:alma:linux:9::baseos

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/1/2026

Vulnerability Publication Date: 1/14/2026

Reference Information

CVE: CVE-2026-22852, CVE-2026-22854, CVE-2026-22856, CVE-2026-23732, CVE-2026-23948, CVE-2026-24491, CVE-2026-24675, CVE-2026-24676, CVE-2026-24679, CVE-2026-24681, CVE-2026-24683, CVE-2026-24684, CVE-2026-31806

CWE: 122, 1285, 131, 416, 476, 787, 825

IAVA: 2026-A-0286

RHSA: 2026:6340