RHEL 9 : fence-agents (RHSA-2026:2299) high Nessus Plugin ID 298396 Language: Synopsis The remote Red Hat host is missing a security update for fence-agents. Description The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:2299 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): * pyasn1: pyasn1: Denial of Service due to memory exhaustion from malformed RELATIVE-OID (CVE-2026-23490) 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 this issue 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-2026:2299. See Also https://access.redhat.com/security/updates/classification/#important https://bugzilla.redhat.com/show_bug.cgi?id=2430472 http://www.nessus.org/u?81c8e2f4 https://access.redhat.com/errata/RHSA-2026:2299 Plugin Details Severity : High ID : 298396 File Name : redhat-RHSA-2026-2299.nasl Version : 1.1 Type : local Agent : unix Family : Red Hat Local Security Checks Published : 2/9/2026 Updated : 2/9/2026 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 : 5.8 Vector : CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C CVSS Score Source : CVE-2026-23490 CVSS v3 Risk Factor : High Base Score : 7.5 Temporal Score : 6.5 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:O/RC:C 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-virt , p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump , p-cpe:/a:redhat:enterprise_linux:fence-virtd-multicast , p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade , p-cpe:/a:redhat:enterprise_linux:fence-virtd-cpg , p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc , 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 , p-cpe:/a:redhat:enterprise_linux:fence-agents-apc-snmp , p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm , cpe:/o:redhat:rhel_eus:9.6 , 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-virtd-serial , 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-virtd-tcp , 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-virtd , 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-virtd-libvirt , 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-a