Linux Distros Unpatched Vulnerability : CVE-2026-59884

high Nessus Plugin ID 327213

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 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.
(CVE-2026-59884)

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: High

ID: 327213

File Name: unpatched_CVE_2026_59884.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 7/16/2026

Updated: 7/16/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

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-2026-59884

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: cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:redhat:enterprise_linux:resource-agents-gcp, p-cpe:/a:debian:debian_linux:pyasn1, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap, p-cpe:/a:centos:centos:resource-agents-sap-hana-scaleout, p-cpe:/a:centos:centos:resource-agents-gcp, p-cpe:/a:redhat:enterprise_linux:python3-pyasn1, cpe:/o:debian:debian_linux:12.0, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:resource-agents-aliyun, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:sap-cluster-connector, p-cpe:/a:redhat:enterprise_linux:resource-agents, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:resource-agents-aliyun, cpe:/o:redhat:enterprise_linux:8, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:centos:centos:python2-pyasn1, p-cpe:/a:centos:centos:resource-agents, p-cpe:/a:centos:centos:resource-agents-sap, p-cpe:/a:redhat:enterprise_linux:python-pyasn1, p-cpe:/a:redhat:enterprise_linux:python2-pyasn1-modules, p-cpe:/a:redhat:enterprise_linux:python3-pyasn1-modules, p-cpe:/a:centos:centos:python3-pyasn1, p-cpe:/a:centos:centos:sap-cluster-connector, p-cpe:/a:centos:centos:resource-agents-sap-hana, p-cpe:/a:centos:centos:python-pyasn1, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap-hana-scaleout, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:resource-agents-sap-hana, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:python3-pyasn1-modules, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:canonical:ubuntu_linux:pyasn1, p-cpe:/a:centos:centos:python2-pyasn1-modules, p-cpe:/a:redhat:enterprise_linux:python2-pyasn1

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: 7/14/2026

Reference Information

CVE: CVE-2026-59884

Detections

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