Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-88806
high Nessus Plugin ID 349072
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.- A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map. (CVE-2026-88806)
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-2026-88806
Plugin Details
Severity: High
ID: 349072
File Name: unpatched_CVE_2026_88806.nasl
Version: 1.14
Type: Local
Agent: unix
Family: Misc.
Published: 9/22/2026
Updated: 11/3/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
Percentile: 58.57
CVSS v2
Risk Factor: High
Base Score: 7.6
Temporal Score: 6.5
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-88806
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:26.10, cpe:/o:centos:centos:7, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:libx11, p-cpe:/a:centos:centos:libx11-common, p-cpe:/a:centos:centos:libx11-devel, p-cpe:/a:centos:centos:libx11, p-cpe:/a:debian:debian_linux:libx11, p-cpe:/a:redhat:enterprise_linux:libx11-common, p-cpe:/a:redhat:enterprise_linux:libx11-devel, p-cpe:/a:redhat:enterprise_linux:libx11
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 9/21/2026
Reference Information
CVE: CVE-2026-88806