Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-12321

medium Nessus Plugin ID 321423

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.

 - JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 152 and Thunderbird 152. (CVE-2026-12321)

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://ubuntu.com/security/CVE-2026-12321

Plugin Details

Severity: Medium

ID: 321423

File Name: unpatched_CVE_2026_12321.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 6/17/2026

Updated: 6/17/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

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

CVSS Score Source: CVE-2026-12321

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:thunderbird, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:mozjs38, p-cpe:/a:canonical:ubuntu_linux:mozjs52, p-cpe:/a:canonical:ubuntu_linux:mozjs68, p-cpe:/a:canonical:ubuntu_linux:mozjs78, p-cpe:/a:canonical:ubuntu_linux:mozjs91, p-cpe:/a:canonical:ubuntu_linux:mozjs102, p-cpe:/a:canonical:ubuntu_linux:mozjs115

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: 6/16/2026

Reference Information

CVE: CVE-2026-12321