Debian dla-4762 : libarchive-dev - security update

low Nessus Plugin ID 341670

Synopsis

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

Description

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4762 advisory.

- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4762-1 [email protected] https://www.debian.org/lts/security/ Abhijith PA August 31, 2026 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package : libarchive Version : 3.4.3-2+deb11u5 3.6.2-1+deb12u5 CVE ID : CVE-2026-14164 CVE-2026-15028 CVE-2026-16517

Several vulnerabilities were discovered in libarchive, a multi-format archive and compression library

CVE-2026-14164

A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

CVE-2026-15028

A remote attacker to trigger a heap overflow by providing a specially crafted tar archive. The issue occurs during the parsing of a PAX extended header containing a malformed SUN.holesdata sparse-file attribute. Successful exploitation could lead to a denial of service, making the system unavailable, or potentially allow for arbitrary code execution, giving the attacker control over the affected system.

CVE-2026-16517

A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.

For Debian 11 bullseye, these problems have been fixed in version 3.4.3-2+deb11u5.

For Debian 12 bookworm, these problems have been fixed in version 3.6.2-1+deb12u5.

We recommend that you upgrade your libarchive packages.

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

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 these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libarchive-dev packages.

Plugin Details

Severity: Low

ID: 341670

File Name: debian_DLA-4762.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/31/2026

Updated: 8/31/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.82

CVSS v2

Risk Factor: Low

Base Score: 3.2

Temporal Score: 2.4

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

CVSS Score Source: CVE-2026-15028

CVSS v3

Risk Factor: Low

Base Score: 3.9

Temporal Score: 3.4

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libarchive-dev, p-cpe:/a:debian:debian_linux:libarchive-tools, p-cpe:/a:debian:debian_linux:libarchive13

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2026

Vulnerability Publication Date: 6/30/2026

Reference Information

CVE: CVE-2026-14164, CVE-2026-15028, CVE-2026-16517

Detections

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