Debian dsa-6403 : libnss3 - security update

critical Nessus Plugin ID 330685

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6403 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6403-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso July 29, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : nss CVE ID : CVE-2026-16389

Tomoya Nakanishi discovered a flaw in nss, the Mozilla Network Security Service library, which may result in execution of arbitrary code if a specially crafted certificate is processed.

For the stable distribution (trixie), this problem has been fixed in version 2:3.110-1+deb13u4.

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/nss

Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the libnss3 packages.

Plugin Details

Severity: Critical

ID: 330685

File Name: debian_DSA-6403.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 7/29/2026

Updated: 7/29/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.16

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-16389

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:libnss3-dev, p-cpe:/a:debian:debian_linux:libnss3-tools, p-cpe:/a:debian:debian_linux:libnss3

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/29/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-16389

Detections

Analytics