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FreeBSD : Mozilla -- Use-after-free (5ef5236d-4305-11f1-a627-b42e991fc52e)

high Nessus Plugin ID 311032

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 5ef5236d-4305-11f1-a627-b42e991fc52e advisory.

 https://bugzilla.mozilla.org/show_bug.cgi?id=2027541 reports:
 Use-after-free in the JavaScript Engine component.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://cveawg.mitre.org/api/cve/CVE-2026-6754

http://www.nessus.org/u?aaa151c3

Plugin Details

Severity: High

ID: 311032

File Name: freebsd_pkg_5ef5236d430511f1a627b42e991fc52e.nasl

Version: 1.1

Type: Local

Published: 4/29/2026

Updated: 4/29/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2026-6754

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:firefox-esr, p-cpe:/a:freebsd:freebsd:thunderbird, cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:firefox

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 4/21/2026

Reference Information

CVE: CVE-2026-6754

IAVA: 2026-A-0388, 2026-A-0390