Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-43964

high Nessus Plugin ID 312107

Language:

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.

 - Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number. (CVE-2026-43964)

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-2026-43964

https://security-tracker.debian.org/tracker/CVE-2026-43964

Plugin Details

Severity: High

ID: 312107

File Name: unpatched_CVE_2026_43964.nasl

Version: 1.11

Type: Local

Agent: unix

Family: Misc.

Published: 5/4/2026

Updated: 6/15/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-43964

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: p-cpe:/a:centos:centos:postfix-sqlite, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:postfix, p-cpe:/a:redhat:enterprise_linux:postfix, p-cpe:/a:centos:centos:postfix-ldap, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:postfix-lmdb, p-cpe:/a:redhat:enterprise_linux:postfix-lmdb, p-cpe:/a:redhat:enterprise_linux:postfix-mysql, p-cpe:/a:centos:centos:postfix-cdb, p-cpe:/a:centos:centos:postfix-mysql, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:postfix-pcre, p-cpe:/a:redhat:enterprise_linux:postfix-pcre, p-cpe:/a:redhat:enterprise_linux:postfix-ldap, p-cpe:/a:centos:centos:postfix-pgsql, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:postfix-cdb, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:postfix, p-cpe:/a:centos:centos:postfix-sysvinit, p-cpe:/a:redhat:enterprise_linux:postfix-pgsql, p-cpe:/a:centos:centos:postfix-perl-scripts, p-cpe:/a:redhat:enterprise_linux:postfix-sysvinit, p-cpe:/a:redhat:enterprise_linux:postfix-perl-scripts, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:postfix-sqlite

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: 5/4/2026

Reference Information

CVE: CVE-2026-43964