Linux Distros Unpatched Vulnerability : CVE-2026-90994

medium Nessus Plugin ID 345689

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 sssd, specifically within the PAM (Pluggable Authentication Modules) responder's protocol v1 parser, pam_parse_in_data(). A local client with access to the PAM responder's UNIX socket can exploit this by negotiating protocol v1 and sending an empty or truncated PAM request body. This can trigger an out-of-bounds read, potentially causing the PAM responder to terminate or restart, leading to a local denial of service. (CVE-2026-90994)

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: Medium

ID: 345689

File Name: unpatched_CVE_2026_90994.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 9/14/2026

Updated: 9/14/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-90994

CVSS v3

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.7

Vector: CVSS:3.0/AV:L/AC:L/PR:N/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: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:centos:centos:libipa_hbac-devel, p-cpe:/a:centos:centos:libipa_hbac-python, p-cpe:/a:centos:centos:libipa_hbac, p-cpe:/a:centos:centos:libsss_autofs, p-cpe:/a:centos:centos:libsss_certmap-devel, p-cpe:/a:centos:centos:libsss_certmap, p-cpe:/a:centos:centos:libsss_idmap-devel, p-cpe:/a:centos:centos:libsss_idmap, p-cpe:/a:centos:centos:libsss_nss_idmap-devel, p-cpe:/a:centos:centos:libsss_nss_idmap-python, p-cpe:/a:centos:centos:libsss_nss_idmap, p-cpe:/a:centos:centos:libsss_simpleifp-devel, p-cpe:/a:centos:centos:libsss_simpleifp, p-cpe:/a:centos:centos:libsss_sudo, p-cpe:/a:centos:centos:python-libipa_hbac, p-cpe:/a:centos:centos:python-libsss_nss_idmap, p-cpe:/a:centos:centos:python-sss-murmur, p-cpe:/a:centos:centos:python-sss, p-cpe:/a:centos:centos:python-sssdconfig, p-cpe:/a:centos:centos:python3-libipa_hbac, p-cpe:/a:centos:centos:python3-libsss_nss_idmap, p-cpe:/a:centos:centos:python3-sss-murmur, p-cpe:/a:centos:centos:python3-sss, p-cpe:/a:centos:centos:python3-sssdconfig, p-cpe:/a:centos:centos:sssd-ad, p-cpe:/a:centos:centos:sssd-client, p-cpe:/a:centos:centos:sssd-common-pac, p-cpe:/a:centos:centos:sssd-common, p-cpe:/a:centos:centos:sssd-dbus, p-cpe:/a:centos:centos:sssd-idp, p-cpe:/a:centos:centos:sssd-ipa, p-cpe:/a:centos:centos:sssd-kcm, p-cpe:/a:centos:centos:sssd-krb5-common, p-cpe:/a:centos:centos:sssd-krb5, p-cpe:/a:centos:centos:sssd-ldap, p-cpe:/a:centos:centos:sssd-libwbclient-devel, p-cpe:/a:centos:centos:sssd-libwbclient, p-cpe:/a:centos:centos:sssd-nfs-idmap, p-cpe:/a:centos:centos:sssd-passkey, p-cpe:/a:centos:centos:sssd-polkit-rules, p-cpe:/a:centos:centos:sssd-proxy, p-cpe:/a:centos:centos:sssd-tools, p-cpe:/a:centos:centos:sssd-winbind-idmap, p-cpe:/a:centos:centos:sssd, p-cpe:/a:debian:debian_linux:sssd, p-cpe:/a:redhat:enterprise_linux:libipa_hbac-devel, p-cpe:/a:redhat:enterprise_linux:libipa_hbac-python, p-cpe:/a:redhat:enterprise_linux:libipa_hbac, p-cpe:/a:redhat:enterprise_linux:libsss_autofs, p-cpe:/a:redhat:enterprise_linux:libsss_certmap-devel, p-cpe:/a:redhat:enterprise_linux:libsss_certmap, p-cpe:/a:redhat:enterprise_linux:libsss_idmap-devel, p-cpe:/a:redhat:enterprise_linux:libsss_idmap, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap-devel, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap-python, p-cpe:/a:redhat:enterprise_linux:libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:libsss_simpleifp-devel, p-cpe:/a:redhat:enterprise_linux:libsss_simpleifp, p-cpe:/a:redhat:enterprise_linux:libsss_sudo, p-cpe:/a:redhat:enterprise_linux:python-libipa_hbac, p-cpe:/a:redhat:enterprise_linux:python-libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:python-sss-murmur, p-cpe:/a:redhat:enterprise_linux:python-sss, p-cpe:/a:redhat:enterprise_linux:python-sssdconfig, p-cpe:/a:redhat:enterprise_linux:python3-libipa_hbac, p-cpe:/a:redhat:enterprise_linux:python3-libsss_nss_idmap, p-cpe:/a:redhat:enterprise_linux:python3-sss-murmur, p-cpe:/a:redhat:enterprise_linux:python3-sss, p-cpe:/a:redhat:enterprise_linux:python3-sssdconfig, p-cpe:/a:redhat:enterprise_linux:sssd-ad, p-cpe:/a:redhat:enterprise_linux:sssd-client, p-cpe:/a:redhat:enterprise_linux:sssd-common-pac, p-cpe:/a:redhat:enterprise_linux:sssd-common, p-cpe:/a:redhat:enterprise_linux:sssd-dbus, p-cpe:/a:redhat:enterprise_linux:sssd-idp, p-cpe:/a:redhat:enterprise_linux:sssd-ipa, p-cpe:/a:redhat:enterprise_linux:sssd-kcm, p-cpe:/a:redhat:enterprise_linux:sssd-krb5-common, p-cpe:/a:redhat:enterprise_linux:sssd-krb5, p-cpe:/a:redhat:enterprise_linux:sssd-ldap, p-cpe:/a:redhat:enterprise_linux:sssd-libwbclient-devel, p-cpe:/a:redhat:enterprise_linux:sssd-libwbclient, p-cpe:/a:redhat:enterprise_linux:sssd-nfs-idmap, p-cpe:/a:redhat:enterprise_linux:sssd-passkey, p-cpe:/a:redhat:enterprise_linux:sssd-polkit-rules, p-cpe:/a:redhat:enterprise_linux:sssd-proxy, p-cpe:/a:redhat:enterprise_linux:sssd-tools, p-cpe:/a:redhat:enterprise_linux:sssd-winbind-idmap, p-cpe:/a:redhat:enterprise_linux:sssd

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: 9/14/2026

Reference Information

CVE: CVE-2026-90994

Detections

Analytics