RHEL 8 : fence-agents (RHSA-2026:12176)

high Nessus Plugin ID 311515

Synopsis

The remote Red Hat host is missing one or more security updates for fence-agents.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:12176 advisory.

The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster.

Security Fix(es):

* cryptography: cryptography Subgroup Attack Due to Missing Subgroup Validation for SECT Curves (CVE-2026-26007)

* pyjwt: PyJWT accepts unknown `crit` header extensions (RFC 7515 ?4.1.11 MUST violation) (CVE-2026-32597)

* pyasn1: pyasn1 Vulnerable to Denial of Service via Unbounded Recursion (CVE-2026-30922)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL fence-agents package based on the guidance in RHSA-2026:12176.

Plugin Details

Severity: High

ID: 311515

File Name: redhat-RHSA-2026-12176.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/2/2026

Updated: 5/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-26007

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-ucs, p-cpe:/a:redhat:enterprise_linux:fence-agents-drac5, p-cpe:/a:redhat:enterprise_linux:fence-agents-bladecenter, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents, p-cpe:/a:redhat:enterprise_linux:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-compute, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsb, p-cpe:/a:redhat:enterprise_linux:fence-agents-scsi, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipmilan, p-cpe:/a:redhat:enterprise_linux:fence-agents-eaton-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo2, p-cpe:/a:redhat:enterprise_linux:fence-agents-intelmodular, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-moonshot, p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:fence-agents-eps, p-cpe:/a:redhat:enterprise_linux:fence-agents-kubevirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipdu, p-cpe:/a:redhat:enterprise_linux:fence-agents-nutanix-ahv, p-cpe:/a:redhat:enterprise_linux:fence-agents-emerson, p-cpe:/a:redhat:enterprise_linux:fence-agents-all, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm, p-cpe:/a:redhat:enterprise_linux:fence-agents-rhevm, p-cpe:/a:redhat:enterprise_linux:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-mpath, p-cpe:/a:redhat:enterprise_linux:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-gce, p-cpe:/a:redhat:enterprise_linux:fence-agents-virsh, p-cpe:/a:redhat:enterprise_linux:fence-agents-redfish, p-cpe:/a:redhat:enterprise_linux:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-lpar, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-rest, p-cpe:/a:redhat:enterprise_linux:fence-agents-azure-arm, p-cpe:/a:redhat:enterprise_linux:fence-agents-hpblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-mp, p-cpe:/a:redhat:enterprise_linux:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-soap, p-cpe:/a:redhat:enterprise_linux:fence-agents-common, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-heuristics-ping, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-sbd, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-mds, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsa

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/30/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-26007, CVE-2026-30922, CVE-2026-32597

CWE: 347, 354, 835

RHSA: 2026:12176

Detections

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