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Linux Distros Unpatched Vulnerability : CVE-2026-26007

high Nessus Plugin ID 298585

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.

 - cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.
 Prior to 46.0.5, the public_key_from_numbers (or EllipticCurvePublicNumbers.public_key()), EllipticCurvePublicNumbers.public_key(), load_der_public_key() and load_pem_public_key() functions do not verify that the point belongs to the expected prime-order subgroup of the curve. This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification (ECDSA) and shared key negotiation (ECDH). When the victim computes the shared secret as S = [victim_private_key]P via ECDH, this leaks information about victim_private_key mod (small_subgroup_order). For curves with cofactor > 1, this reveals the least significant bits of the private key. When these weak public keys are used in ECDSA , it's easy to forge signatures on the small subgroup. Only SECT curves are impacted by this. This vulnerability is fixed in 46.0.5. (CVE-2026-26007)

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-2026-26007

https://security-tracker.debian.org/tracker/CVE-2026-26007

Plugin Details

Severity: High

ID: 298585

File Name: unpatched_CVE_2026_26007.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 2/10/2026

Updated: 2/11/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-26007

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:H/I:N/A:N

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

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: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:redhat:enterprise_linux:fence-agents, p-cpe:/a:centos:centos:fence-agents-rhevm, p-cpe:/a:centos:centos:fence-agents-vmware-rest, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-rest, p-cpe:/a:centos:centos:fence-agents-scsi, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-mp, p-cpe:/a:centos:centos:fence-agents-intelmodular, p-cpe:/a:redhat:enterprise_linux:fence-virtd-cpg, p-cpe:/a:centos:centos:fence-agents-lpar, p-cpe:/a:centos:centos:fence-virtd-tcp, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsb, p-cpe:/a:centos:centos:fence-agents-ipdu, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:fence-agents-ilo2, p-cpe:/a:redhat:enterprise_linux:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-kubevirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-common, p-cpe:/a:centos:centos:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-emerson, p-cpe:/a:redhat:enterprise_linux:fence-agents-lpar, p-cpe:/a:centos:centos:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:fence-agents-compute, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:fence-agents-heuristics-ping, p-cpe:/a:centos:centos:fence-agents-ipmilan, p-cpe:/a:redhat:enterprise_linux:fence-virtd-libvirt, p-cpe:/a:centos:centos:fence-agents-apc, p-cpe:/a:redhat:enterprise_linux:fence-agents-nutanix-ahv, 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-redfish, p-cpe:/a:redhat:enterprise_linux:ha-cloud-support, p-cpe:/a:centos:centos:fence-agents-ifmib, p-cpe:/a:centos:centos:fence-agents-eaton-snmp, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-ssh, p-cpe:/a:redhat:enterprise_linux:fence-agents-mpath, p-cpe:/a:redhat:enterprise_linux:fence-agents-virsh, p-cpe:/a:centos:centos:fence-agents-apc-snmp, p-cpe:/a:centos:centos:fence-agents-aws, p-cpe:/a:redhat:enterprise_linux:fence-agents-scsi, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:fence-virt, p-cpe:/a:centos:centos:fence-agents-ilo-moonshot, p-cpe:/a:centos:centos:fence-agents-ilo-mp, p-cpe:/a:redhat:enterprise_linux:fence-agents-openstack, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-mds, p-cpe:/a:centos:centos:fence-agents-eps, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:redhat:enterprise_linux:fence-agents-aliyun, p-cpe:/a:redhat:enterprise_linux:fence-agents-bladecenter, p-cpe:/a:redhat:enterprise_linux:fence-virtd-multicast, p-cpe:/a:centos:centos:fence-agents-vmware-soap, p-cpe:/a:centos:centos:fence-virtd-serial, p-cpe:/a:centos:centos:fence-agents-kdump, p-cpe:/a:redhat:enterprise_linux:fence-agents-zvm, p-cpe:/a:centos:centos:fence-agents-azure-arm, p-cpe:/a:centos:centos:fence-agents-zvm, p-cpe:/a:centos:centos:fence-virtd-multicast, p-cpe:/a:centos:centos:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo2, p-cpe:/a:centos:centos:fence-agents-compute, p-cpe:/a:centos:centos:fence-agents-aliyun, p-cpe:/a:centos:centos:ha-cloud-support, 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-common, p-cpe:/a:redhat:enterprise_linux:fence-agents-kdump, p-cpe:/a:centos:centos:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-all, p-cpe:/a:centos:centos:fence-agents-nutanix-ahv, p-cpe:/a:centos:centos:fence-agents, p-cpe:/a:centos:centos:fence-agents-cisco-ucs, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-azure-arm, p-cpe:/a:redhat:enterprise_linux:fence-agents-drac5, p-cpe:/a:centos:centos:fence-agents-emerson, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibmblade, p-cpe:/a:redhat:enterprise_linux:fence-agents-intelmodular, p-cpe:/a:centos:centos:fence-agents-drac5, p-cpe:/a:centos:centos:fence-agents-ibmblade, p-cpe:/a:centos:centos:fence-agents-cisco-mds, p-cpe:/a:redhat:enterprise_linux:fence-agents-rhevm, p-cpe:/a:redhat:enterprise_linux:fence-agents-brocade, p-cpe:/a:redhat:enterprise_linux:fence-agents-vmware-soap, p-cpe:/a:centos:centos:fence-agents-sbd, p-cpe:/a:redhat:enterprise_linux:fence-agents-sbd, p-cpe:/a:centos:centos:fence-agents-rsa, p-cpe:/a:redhat:enterprise_linux:fence-agents-eps, p-cpe:/a:centos:centos:fence-virtd, p-cpe:/a:redhat:enterprise_linux:fence-agents-cisco-ucs, p-cpe:/a:redhat:enterprise_linux:fence-agents-ibm-vpc, p-cpe:/a:centos:centos:fence-agents-virsh, p-cpe:/a:redhat:enterprise_linux:fence-virtd-serial, p-cpe:/a:redhat:enterprise_linux:fence-virt, p-cpe:/a:centos:centos:fence-agents-ilo-ssh, p-cpe:/a:centos:centos:fence-agents-kubevirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-heuristics-ping, p-cpe:/a:redhat:enterprise_linux:fence-agents-gce, p-cpe:/a:centos:centos:fence-agents-bladecenter, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:redhat:enterprise_linux:fence-agents-amt-ws, p-cpe:/a:redhat:enterprise_linux:fence-virtd, p-cpe:/a:centos:centos:fence-agents-ibm-powervs, p-cpe:/a:redhat:enterprise_linux:fence-agents-wti, p-cpe:/a:redhat:enterprise_linux:fence-agents-redfish, p-cpe:/a:redhat:enterprise_linux:fence-virtd-tcp, p-cpe:/a:centos:centos:fence-virtd-cpg, p-cpe:/a:redhat:enterprise_linux:fence-agents-all, p-cpe:/a:centos:centos:fence-agents-brocade, p-cpe:/a:centos:centos:fence-virtd-libvirt, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipmilan, p-cpe:/a:debian:debian_linux:python-cryptography, p-cpe:/a:redhat:enterprise_linux:fence-agents-ilo-moonshot, p-cpe:/a:centos:centos:fence-agents-rsb, p-cpe:/a:redhat:enterprise_linux:fence-agents-hpblade, p-cpe:/a:centos:centos:fence-agents-ibm-vpc, p-cpe:/a:redhat:enterprise_linux:fence-agents-ifmib, p-cpe:/a:redhat:enterprise_linux:fence-agents-rsa, p-cpe:/a:redhat:enterprise_linux:fence-agents-ipdu

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-26007