Detections
Analytics
TencentOS Server 2: tigervnc (TSSA-2025:0924)
high Nessus Plugin ID 277459
Synopsis
The remote TencentOS Server 2 host is missing one or more security updates.Description
The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0924 advisory.Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:
CVE-2025-62229:
A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications.
Improper error handling during notification creation can leave dangling pointers that lead to a use-after- free condition. This can cause memory corruption or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.
CVE-2025-62230:
A flaw was discovered in the X.Org X servers X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.
CVE-2025-62231:
A flaw was identified in the X.Org X servers X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.
Tenable has extracted the preceding description block directly from the Tencent 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 affected packages.See Also
Plugin Details
Severity: High
ID: 277459
File Name: tencentos_TSSA_2025_0924.nasl
Version: 1.1
Type: local
Family: Tencent Local Security Checks
Published: 12/4/2025
Updated: 12/4/2025
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.0
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 6.7
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2025-62231
CVSS v3
Risk Factor: High
Base Score: 7.3
Temporal Score: 6.4
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:tencent:tencentos_server:tigervnc, cpe:/o:tencent:tencentos_server:2
Required KB Items: Host/local_checks_enabled, Host/etc/os-release, Host/TencentOS/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 11/25/2025
Vulnerability Publication Date: 10/28/2025