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Linux Distros Unpatched Vulnerability : CVE-2026-73196

medium Nessus Plugin ID 338256

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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.

 - A flaw was found in FreeIPA. A low-privilege authenticated user can exploit this vulnerability by submitting an oversized One-Time Password (OTP) key value. This oversized key is then decoded and re- encoded without proper size limits, consuming excessive CPU and memory resources. This can lead to a denial of service, degrading the availability of the IPA service. (CVE-2026-73196)

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-2026-73196

https://security-tracker.debian.org/tracker/CVE-2026-73196

https://ubuntu.com/security/CVE-2026-73196

Plugin Details

Severity: Medium

ID: 338256

File Name: unpatched_CVE_2026_73196.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 8/20/2026

Updated: 8/21/2026

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: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.4

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

CVSS Score Source: CVE-2026-73196

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 4

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:freeipa, p-cpe:/a:centos:centos:ipa-admintools, p-cpe:/a:centos:centos:ipa-client-common, p-cpe:/a:centos:centos:ipa-client-encrypted-dns, p-cpe:/a:centos:centos:ipa-client-epn, p-cpe:/a:centos:centos:ipa-client-samba, p-cpe:/a:centos:centos:ipa-client, p-cpe:/a:centos:centos:ipa-common, p-cpe:/a:centos:centos:ipa-python-compat, p-cpe:/a:centos:centos:ipa-python, p-cpe:/a:centos:centos:ipa-selinux-luna, p-cpe:/a:centos:centos:ipa-selinux-nfast, p-cpe:/a:centos:centos:ipa-selinux, p-cpe:/a:centos:centos:ipa-server-common, p-cpe:/a:centos:centos:ipa-server-dns, p-cpe:/a:centos:centos:ipa-server-encrypted-dns, p-cpe:/a:centos:centos:ipa-server-trust-ad, p-cpe:/a:centos:centos:ipa-server, p-cpe:/a:centos:centos:ipa, p-cpe:/a:centos:centos:python2-ipaclient, p-cpe:/a:centos:centos:python2-ipalib, p-cpe:/a:centos:centos:python2-ipaserver, p-cpe:/a:centos:centos:python3-ipaclient, p-cpe:/a:centos:centos:python3-ipalib, p-cpe:/a:centos:centos:python3-ipaserver, p-cpe:/a:centos:centos:python3-ipatests, p-cpe:/a:debian:debian_linux:freeipa, p-cpe:/a:redhat:enterprise_linux:ipa-admintools, p-cpe:/a:redhat:enterprise_linux:ipa-client-common, p-cpe:/a:redhat:enterprise_linux:ipa-client-encrypted-dns, p-cpe:/a:redhat:enterprise_linux:ipa-client-epn, p-cpe:/a:redhat:enterprise_linux:ipa-client-samba, p-cpe:/a:redhat:enterprise_linux:ipa-client, p-cpe:/a:redhat:enterprise_linux:ipa-common, p-cpe:/a:redhat:enterprise_linux:ipa-python-compat, p-cpe:/a:redhat:enterprise_linux:ipa-python, p-cpe:/a:redhat:enterprise_linux:ipa-selinux-luna, p-cpe:/a:redhat:enterprise_linux:ipa-selinux-nfast, p-cpe:/a:redhat:enterprise_linux:ipa-selinux, p-cpe:/a:redhat:enterprise_linux:ipa-server-common, p-cpe:/a:redhat:enterprise_linux:ipa-server-dns, p-cpe:/a:redhat:enterprise_linux:ipa-server-encrypted-dns, p-cpe:/a:redhat:enterprise_linux:ipa-server-trust-ad, p-cpe:/a:redhat:enterprise_linux:ipa-server, p-cpe:/a:redhat:enterprise_linux:ipa, p-cpe:/a:redhat:enterprise_linux:python2-ipaclient, p-cpe:/a:redhat:enterprise_linux:python2-ipalib, p-cpe:/a:redhat:enterprise_linux:python2-ipaserver, p-cpe:/a:redhat:enterprise_linux:python3-ipaclient, p-cpe:/a:redhat:enterprise_linux:python3-ipalib, p-cpe:/a:redhat:enterprise_linux:python3-ipaserver, p-cpe:/a:redhat:enterprise_linux:python3-ipatests

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: 8/20/2026

Reference Information

CVE: CVE-2026-73196