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Debian dla-4681 : p7zip - security update

high Nessus Plugin ID 326550

Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4681 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-4681-1 [email protected] https://www.debian.org/lts/security/ Sylvain Beucler July 13, 2026 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : p7zip Version : 16.02+really26.01+dfsg-0+deb11u1 CVE ID : CVE-2026-48092 CVE-2026-48095 CVE-2026-48101 CVE-2026-48102 CVE-2026-48103 CVE-2026-48104 CVE-2026-48111 CVE-2026-48112

 Multiple memory corruption vulnerabilities were discovered in p7zip, a now unmaintained fork of 7-Zip, which itself is a file archiver handling multiple formats.

 To address these security vulnerabilities, whose fixes are unfortunately not isolated, this update again replaces p7zip with a recent 7-Zip (now v26.01), slightly modified to make it reasonably compatible with p7zip.

 CVE-2026-48092

 SquashFS Fragment Offset Overflow

 CVE-2026-48095

 Heap Buffer Write Overflow

 CVE-2026-48101

 UEFI Capsule uninitialized heap memory disclosure

 CVE-2026-48102

 UDF Field OOB Read

 CVE-2026-48103

 WIM SecurityId OOB read

 CVE-2026-48104

 SquashFS BlockToNode uninitialized heap read

 CVE-2026-48111

 UEFI DEPEX OOB Read

 CVE-2026-48112

 Ar SYMDEF OOB Read

 For Debian 11 bullseye, these problems have been fixed in version 16.02+really26.01+dfsg-0+deb11u1.

 We recommend that you upgrade your p7zip packages.

 For the detailed security status of p7zip please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/p7zip

 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 p7zip packages.

See Also

https://packages.debian.org/source/bullseye/p7zip

https://security-tracker.debian.org/tracker/CVE-2026-48092

https://security-tracker.debian.org/tracker/CVE-2026-48095

https://security-tracker.debian.org/tracker/CVE-2026-48101

https://security-tracker.debian.org/tracker/CVE-2026-48102

https://security-tracker.debian.org/tracker/CVE-2026-48103

https://security-tracker.debian.org/tracker/CVE-2026-48104

https://security-tracker.debian.org/tracker/CVE-2026-48111

https://security-tracker.debian.org/tracker/CVE-2026-48112

https://security-tracker.debian.org/tracker/source-package/p7zip

Plugin Details

Severity: High

ID: 326550

File Name: debian_DLA-4681.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/13/2026

Updated: 7/13/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.36

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-48092

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:p7zip, p-cpe:/a:debian:debian_linux:p7zip-full, cpe:/o:debian:debian_linux:11.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/13/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-48092, CVE-2026-48095, CVE-2026-48101, CVE-2026-48102, CVE-2026-48103, CVE-2026-48104, CVE-2026-48111, CVE-2026-48112