Debian dla-4689 : libnfs-dev - security update

high Nessus Plugin ID 327822

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Synopsis

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

Description

The remote Debian 11 / 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4689 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4689-1 [email protected] https://www.debian.org/lts/security/ Thorsten Alteholz July 19, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : libnfs Version : 4.0.0-1+deb11u1 4.0.0-1+deb12u1 CVE ID : CVE-2026-53689 Debian Bug : 1139731

An issue has been found in libnfs, am NFS client library.
The issue is related to to a missing validation of a string size that might lead to an integer overflow.

For Debian 11 bullseye, this problem has been fixed in version 4.0.0-1+deb11u1.

For Debian 12 bookworm, this problem has been fixed in version 4.0.0-1+deb12u1.

We recommend that you upgrade your libnfs packages.

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

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

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 libnfs-dev packages.

Plugin Details

Severity: High

ID: 327822

File Name: debian_DLA-4689.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 7/19/2026

Updated: 7/19/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.5

Percentile: 57.58

CVSS v2

Risk Factor: High

Base Score: 7.3

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-53689

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libnfs-dev, p-cpe:/a:debian:debian_linux:libnfs13, p-cpe:/a:debian:debian_linux:libnfs-utils, cpe:/o:debian:debian_linux:12.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/19/2026

Vulnerability Publication Date: 6/10/2026

Reference Information

CVE: CVE-2026-53689

Detections

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