Linux Distros Unpatched Vulnerability : CVE-2026-95520

high Nessus Plugin ID 351185

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 heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
(CVE-2026-95520)

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: 351185

File Name: unpatched_CVE_2026_95520.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 9/29/2026

Updated: 9/30/2026

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: 4.3

Percentile: 53.44

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.4

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

CVSS Score Source: CVE-2026-95520

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:python3-rpm, p-cpe:/a:centos:centos:rpm-apidocs, p-cpe:/a:centos:centos:rpm-build-libs, p-cpe:/a:centos:centos:rpm-build, p-cpe:/a:centos:centos:rpm-cron, p-cpe:/a:centos:centos:rpm-devel, p-cpe:/a:centos:centos:rpm-libs, p-cpe:/a:centos:centos:rpm-plugin-audit, p-cpe:/a:centos:centos:rpm-plugin-dbus-announce, p-cpe:/a:centos:centos:rpm-plugin-fapolicyd, p-cpe:/a:centos:centos:rpm-plugin-ima, p-cpe:/a:centos:centos:rpm-plugin-prioreset, p-cpe:/a:centos:centos:rpm-plugin-selinux, p-cpe:/a:centos:centos:rpm-plugin-syslog, p-cpe:/a:centos:centos:rpm-plugin-systemd-inhibit, p-cpe:/a:centos:centos:rpm-sign-libs, p-cpe:/a:centos:centos:rpm-sign, p-cpe:/a:centos:centos:rpm, p-cpe:/a:debian:debian_linux:rpm, p-cpe:/a:redhat:enterprise_linux:python3-rpm, p-cpe:/a:redhat:enterprise_linux:rpm-apidocs, p-cpe:/a:redhat:enterprise_linux:rpm-build-libs, p-cpe:/a:redhat:enterprise_linux:rpm-build, p-cpe:/a:redhat:enterprise_linux:rpm-cron, p-cpe:/a:redhat:enterprise_linux:rpm-devel, p-cpe:/a:redhat:enterprise_linux:rpm-libs, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-audit, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-dbus-announce, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-fapolicyd, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-ima, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-prioreset, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-selinux, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-syslog, p-cpe:/a:redhat:enterprise_linux:rpm-plugin-systemd-inhibit, p-cpe:/a:redhat:enterprise_linux:rpm-sign-libs, p-cpe:/a:redhat:enterprise_linux:rpm-sign, p-cpe:/a:redhat:enterprise_linux:rpm

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: 9/29/2026

Reference Information

CVE: CVE-2026-95520

Detections

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