Linux Distros Unpatched Vulnerability : CVE-2026-39244

high Nessus Plugin ID 326975

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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.

- adm-zip before 0.5.18 is vulnerable to denial of service via a crafted ZIP file with a manipulated uncompressed size header field. In zipEntry.js line 103, Buffer.alloc(_centralHeader.size) allocates memory based on the declared uncompressed size from the ZIP central directory header without validating it against the actual compressed data size or imposing any upper bound. The size value is read directly from the binary header at entryHeader.js line 266 with no bounds check. An attacker can craft a ~120-byte ZIP file that declares ~4GB uncompressed size, causing a memory allocation amplification ratio of over 33 million to 1. The allocation occurs before CRC validation, so the malicious payload cannot be rejected early. All extraction and read methods are affected: readFile(), readAsText(), extractEntryTo(), extractAllTo(), extractAllToAsync(), test(), and entry.getData(). Any application accepting untrusted ZIP files via adm-zip is vulnerable to immediate process crash. (CVE-2026-39244)

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: 326975

File Name: unpatched_CVE_2026_39244.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 7/15/2026

Updated: 7/15/2026

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: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-39244

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:redhat:enterprise_linux:gjs-devel, p-cpe:/a:centos:centos:gjs, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:gjs, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:centos:centos:dotnet5.0-build-reference-packages, p-cpe:/a:centos:centos:mozjs60-devel, p-cpe:/a:centos:centos:mozjs60, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:mozjs60, p-cpe:/a:redhat:enterprise_linux:dotnet5.0-build-reference-packages, p-cpe:/a:redhat:enterprise_linux:mozjs60-devel, p-cpe:/a:centos:centos:gjs-devel

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: 7/10/2026

Reference Information

CVE: CVE-2026-39244

Detections

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