Linux Distros Unpatched Vulnerability : CVE-2026-121995

high Nessus Plugin ID 376651

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 stack buffer overflow in the GDB client's tracepoint upload handler allows an attacker-controlled debug stub to corrupt stack memory automatically during connection setup. The overflow results from GDB reading beyond the current reply boundary into a stale prior reply in the shared packet buffer. (CVE-2026-121995)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 376651

File Name: unpatched_CVE_2026_121995.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 11/5/2026

Updated: 11/6/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.51

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-2026-121995

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:/a:redhat:enterprise_linux:10, cpe:/a:redhat:enterprise_linux:8, cpe:/a:redhat:enterprise_linux:9, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:gcc-toolset-14-gdb, p-cpe:/a:centos:centos:gcc-toolset-15-gdb, p-cpe:/a:centos:centos:gdb-doc, p-cpe:/a:centos:centos:gdb-gdbserver, p-cpe:/a:centos:centos:gdb-headless, p-cpe:/a:centos:centos:gdb-minimal, p-cpe:/a:centos:centos:gdb, p-cpe:/a:redhat:enterprise_linux:gcc-toolset-14-gdb, p-cpe:/a:redhat:enterprise_linux:gcc-toolset-15-gdb, p-cpe:/a:redhat:enterprise_linux:gdb-doc, p-cpe:/a:redhat:enterprise_linux:gdb-gdbserver, p-cpe:/a:redhat:enterprise_linux:gdb-headless, p-cpe:/a:redhat:enterprise_linux:gdb-minimal, p-cpe:/a:redhat:enterprise_linux:gdb

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 11/5/2026

Reference Information

CVE: CVE-2026-121995

Detections

Analytics