Linux Distros Unpatched Vulnerability : CVE-2026-5946

high Nessus Plugin ID 315765

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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.

- Multiple flaws have been identified in `named` related to the handling of DNS messages whose CLASS is not Internet (`IN`) for example, `CHAOS` or `HESIOD`, or DNS messages that specify meta-classes (`ANY` or `NONE`) in the question section. Specially crafted requests reaching the affected code paths recursion, dynamic updates (`UPDATE`), zone change notifications (`NOTIFY`), or processing of `IN`-specific record types in non-`IN` data can cause assertion failures in `named`. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1. (CVE-2026-5946)

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: 315765

File Name: unpatched_CVE_2026_5946.nasl

Version: 1.16

Type: Local

Agent: unix

Family: Misc.

Published: 5/20/2026

Updated: 6/9/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.6

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

CVSS Score Source: CVE-2026-5946

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:bind-pkcs11-utils, cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:bind-pkcs11-devel, p-cpe:/a:redhat:enterprise_linux:bind-sdb, p-cpe:/a:centos:centos:bind-sdb-chroot, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:centos:centos:bind-devel, p-cpe:/a:centos:centos:bind-sdb, p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-utils, p-cpe:/a:centos:centos:bind-chroot, p-cpe:/a:centos:centos:bind-export-libs, p-cpe:/a:centos:centos:bind-libs, p-cpe:/a:canonical:ubuntu_linux:bind9-libs, p-cpe:/a:centos:centos:bind-pkcs11-libs, p-cpe:/a:canonical:ubuntu_linux:bind9, p-cpe:/a:centos:centos:bind-license, p-cpe:/a:redhat:enterprise_linux:bind-libs-lite, p-cpe:/a:redhat:enterprise_linux:bind-utils, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-libs, p-cpe:/a:centos:centos:bind-libs-lite, p-cpe:/a:centos:centos:bind, p-cpe:/a:redhat:enterprise_linux:bind-lite-devel, p-cpe:/a:redhat:enterprise_linux:bind-chroot, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:bind-libs, p-cpe:/a:redhat:enterprise_linux:bind-license, p-cpe:/a:redhat:enterprise_linux:bind-export-devel, p-cpe:/a:centos:centos:bind-lite-devel, p-cpe:/a:redhat:enterprise_linux:bind-export-libs, p-cpe:/a:redhat:enterprise_linux:bind-devel, p-cpe:/a:redhat:enterprise_linux:bind-pkcs11-devel, p-cpe:/a:centos:centos:bind-export-devel, p-cpe:/a:centos:centos:bind-pkcs11, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:bind-sdb-chroot, p-cpe:/a:centos:centos:bind-utils, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:bind-pkcs11, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:debian:debian_linux:bind9, p-cpe:/a:redhat:enterprise_linux:bind

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: 5/20/2026

Reference Information

CVE: CVE-2026-5946

Detections

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