Detections
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RHEL 8 : tigervnc (RHSA-2025:9392)
medium Nessus Plugin ID 240287
Synopsis
The remote Red Hat host is missing one or more security updates for tigervnc.Description
The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:9392 advisory.Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.
Security Fix(es):
* xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Out-of-Bounds Read in X Rendering Extension Animated Cursors (CVE-2025-49175)
* xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in Big Requests Extension (CVE-2025-49176)
* xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Unprocessed Client Request Due to Bytes to Ignore (CVE-2025-49178)
* xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer overflow in X Record extension (CVE-2025-49179)
* xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in X Resize, Rotate and Reflect (RandR) Extension (CVE-2025-49180)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 RHEL tigervnc package based on the guidance in RHSA-2025:9392.See Also
https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2369977
https://bugzilla.redhat.com/show_bug.cgi?id=2369947
https://bugzilla.redhat.com/show_bug.cgi?id=2369978
https://bugzilla.redhat.com/show_bug.cgi?id=2369954
https://bugzilla.redhat.com/show_bug.cgi?id=2369981
Plugin Details
Severity: Medium
ID: 240287
File Name: redhat-RHSA-2025-9392.nasl
Version: 1.1
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 6/23/2025
Updated: 6/23/2025
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.5
Vendor
Vendor Severity: Important
CVSS v2
Risk Factor: Medium
Base Score: 5.7
Temporal Score: 4.2
Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:C
CVSS Score Source: CVE-2025-49179
CVSS v3
Risk Factor: Medium
Base Score: 6.6
Temporal Score: 5.8
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:tigervnc, p-cpe:/a:redhat:enterprise_linux:tigervnc-icons, p-cpe:/a:redhat:enterprise_linux:tigervnc-license, p-cpe:/a:redhat:enterprise_linux:tigervnc-server, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-minimal, p-cpe:/a:redhat:enterprise_linux:tigervnc-server-module, p-cpe:/a:redhat:enterprise_linux:tigervnc-selinux, cpe:/o:redhat:rhel_eus:8.10
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 6/23/2025
Vulnerability Publication Date: 6/17/2025
Reference Information
CVE: CVE-2025-49175, CVE-2025-49176, CVE-2025-49178, CVE-2025-49179, CVE-2025-49180