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Linux Distros Unpatched Vulnerability : CVE-2026-30922
high Nessus Plugin ID 302886
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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.- pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.3, the `pyasn1` library is vulnerable to a Denial of Service (DoS) attack caused by uncontrolled recursion when decoding ASN.1 data with deeply nested structures. An attacker can supply a crafted payload containing thousands of nested `SEQUENCE` (`0x30`) or `SET` (`0x31`) tags with Indefinite Length (`0x80`) markers. This forces the decoder to recursively call itself until the Python interpreter crashes with a `RecursionError` or consumes all available memory (OOM), crashing the host application. This is a distinct vulnerability from CVE-2026-23490 (which addressed integer overflows in OID decoding). The fix for CVE-2026-23490 (`MAX_OID_ARC_CONTINUATION_OCTETS`) does not mitigate this recursion issue. Version 0.6.3 fixes this specific issue. (CVE-2026-30922)
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-2026-30922
Plugin Details
Severity: High
ID: 302886
File Name: unpatched_CVE_2026_30922.nasl
Version: 1.3
Type: local
Agent: unix
Family: Misc.
Published: 3/18/2026
Updated: 3/19/2026
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: 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-2026-30922
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:fence-agents-drac5, p-cpe:/a:centos:centos:fence-agents-kdump, p-cpe:/a:centos:centos:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:resource-agents, p-cpe:/a:redhat:enterprise_linux:resource-agents-aliyun, p-cpe:/a:centos:centos:fence-agents-eaton-snmp, p-cpe:/a:centos:centos:fence-agents-scsi, p-cpe:/a:redhat:enterprise_linux:fence-agents-emerson, p-cpe:/a:redhat:enterprise_linux:fence-agents-all, p-cpe:/a:centos:centos:resource-agents, p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm, p-cpe:/a:centos:centos:fence-agents-ipdu, p-cpe:/a:redhat:enterprise_linux:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-lpar, p-cpe:/a:centos:centos:ha-cloud-support, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-mp, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-soap, cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:fence-agents-ibm-powervs, p-cpe:/a:centos:centos:fence-agents-ilo-mp, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:fence-agents-heuristics-ping, p-cpe:/a:centos:centos:fence-agents-rsa, p-cpe:/a:debian:debian_linux:pyasn1, p-cpe:/a:redhat:enterprise_linux:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents, p-cpe:/a:centos:centos:fence-agents-cisco-ucs, p-cpe:/a:centos:centos:fence-agents-emerson, 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-virt, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:fence-agents-ibm-vpc, p-cpe:/a:centos:centos:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade, p-cpe:/a:centos:centos:fence-agents-compute, p-cpe:/a:redhat:enterprise_linux:fence-agents-eps, p-cpe:/a:redhat:enterprise_linux:fence-agents-kubevirt, cpe:/o:redhat:enterprise_linux:10, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:fence-agents-rhevm, p-cpe:/a:centos:centos:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-redfish, p-cpe:/a:centos:centos:fence-agents-rhevm, p-cpe:/a:redhat:enterprise_linux:fence-virtd-tcp, p-cpe:/a:centos:centos:fence-agents-vmware-rest, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-mds, p-cpe:/a:centos:centos:fence-agents-eps, p-cpe:/a:centos:centos:fence-agents-intelmodular, p-cpe:/a:centos:centos:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents-scsi, p-cpe:/a:centos:centos:fence-agents-mpath, p-cpe:/a:redhat:enterprise_linux:fence-agents-eaton-snmp, p-cpe:/a:centos:centos:fence-agents-lpar, p-cpe:/a:redhat:enterprise_linux:fence-agents-azure-arm, p-cpe:/a:redhat:enterprise_linux:fence-virtd-libvirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsa, p-cpe:/a:centos:centos:fence-agents-bladecenter, p-cpe:/a:centos:centos:fence-virtd-libvirt, p-cpe:/a:centos:centos:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:resource-agents-gcp, p-cpe:/a:redhat:enterprise_linux:fence-agents-drac5, p-cpe:/a:redhat:enterprise_linux:fence-agents-bladecenter, p-cpe:/a:centos:centos:fence-virt, p-cpe:/a:redhat:enterprise_linux:fence-agents-compute, p-cpe:/a:centos:centos:fence-agents-ibmblade, p-cpe:/a:centos:centos:fence-virtd-cpg, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-rest, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:resource-agents-paf, p-cpe:/a:centos:centos:fence-virtd-tcp, p-cpe:/a:centos:centos:fence-agents-ipmilan, p-cpe:/a:centos:centos:fence-agents-kubevirt, p-cpe:/a:centos:centos:fence-virtd, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-common, p-cpe:/a:redhat:enterprise_linux:fence-agents-heuristics-ping, p-cpe:/a:centos:centos:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-ucs, p-cpe:/a:centos:centos:fence-agents-vmware-soap, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsb, p-cpe:/a:centos:centos:resource-agents-gcp, p-cpe:/a:centos:centos:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-intelmodular, p-cpe:/a:redhat:enterprise_linux:resource-agents-paf, p-cpe:/a:centos:centos:fence-virtd-serial, p-cpe:/a:centos:centos:resource-agents-aliyun, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:centos:centos:fence-agents-ilo2, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:fence-virtd-cpg, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:centos:centos:fence-agents-azure-arm, p-cpe:/a:centos:centos:fence-agents-zvm, p-cpe:/a:redhat:enterprise_linux:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-mpath, p-cpe:/a:centos:centos:fence-agents-common, 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-ipmilan, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:fence-virtd-multicast, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-moonshot, p-cpe:/a:redhat:enterprise_linux:fence-virtd-multicast, p-cpe:/a:centos:centos:fence-agents-cisco-mds, p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump, p-cpe:/a:centos:centos:fence-agents-apc, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-rsb, p-cpe:/a:centos:centos:fence-agents-all, p-cpe:/a:centos:centos:fence-agents-nutanix-ahv, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipdu, p-cpe:/a:redhat:enterprise_linux:fence-agents-nutanix-ahv, p-cpe:/a:centos:centos:fence-agents-ilo-moonshot, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc-snmp, p-cpe:/a:centos:centos:fence-agents-gce, p-cpe:/a:centos:centos:fence-agents, p-cpe:/a:redhat:enterprise_linux:fence-agents-virsh, p-cpe:/a:centos:centos:fence-agents-apc-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-virtd, p-cpe:/a:redhat:enterprise_linux:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-virsh, p-cpe:/a:centos:centos:fence-agents-sbd, p-cpe:/a:canonical:ubuntu_linux:pyasn1, p-cpe:/a:centos:centos:fence-agents-redfish, p-cpe:/a:redhat:enterprise_linux:fence-agents-sbd, p-cpe:/a:redhat:enterprise_linux:fence-virtd-serial, p-cpe:/a:centos:centos:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:ha-cloud-support
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: 3/17/2026
Reference Information
CVE: CVE-2026-30922