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Linux Distros Unpatched Vulnerability : CVE-2026-25997

medium Nessus Plugin ID 299996

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Debian Linux - freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_clipboard_format_equal` reads freed `lastSentFormats` memory because `xf_clipboard_formats_free` (called from the cliprdr channel thread during auto-reconnect) frees the array while the X11 event thread concurrently iterates it in `xf_clipboard_changed`, triggering a heap use after free. Version 3.23.0 fixes the issue. freerdp3 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_clipboard_format_equal` reads freed `lastSentFormats` memory because `xf_clipboard_formats_free` (called from the cliprdr channel thread during auto-reconnect) frees the array while the X11 event thread concurrently iterates it in `xf_clipboard_changed`, triggering a heap use after free. Version 3.23.0 fixes the issue. Red Hat Enterprise Linux - freerdp: FreeRDP: Denial of service via heap use-after-free during auto-reconnect (CVE-2026-25997)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-25997

https://security-tracker.debian.org/tracker/CVE-2026-25997

Plugin Details

Severity: Medium

ID: 299996

File Name: unpatched_CVE_2026_25997.nasl

Version: 1.1

Type: local

Agent: unix

Family: Misc.

Published: 2/26/2026

Updated: 2/26/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-25997

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:freerdp, p-cpe:/a:centos:centos:freerdp-plugins, cpe:/o:debian:debian_linux:14.0, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:libwinpr-devel, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:freerdp-server, p-cpe:/a:centos:centos:libwinpr-devel, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:redhat:enterprise_linux:freerdp-plugins, cpe:/o:redhat:enterprise_linux:7, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:freerdp, p-cpe:/a:redhat:enterprise_linux:freerdp-server, p-cpe:/a:redhat:enterprise_linux:freerdp-libs, p-cpe:/a:redhat:enterprise_linux:freerdp-devel, p-cpe:/a:debian:debian_linux:freerdp2, p-cpe:/a:debian:debian_linux:freerdp3, p-cpe:/a:centos:centos:freerdp-libs, p-cpe:/a:centos:centos:libwinpr, p-cpe:/a:centos:centos:freerdp-devel, cpe:/o:redhat:enterprise_linux:6, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:libwinpr

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2026-25997