Debian dsa-6423 : kitty - security update

high Nessus Plugin ID 333554

Synopsis

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

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6423 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6423-1 [email protected] https://www.debian.org/security/ Nilesh Patra August 09, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : kitty CVE ID : CVE-2026-42850 CVE-2026-42851 CVE-2026-54055 CVE-2026-54057 Debian Bug : 1139898

Multiple security issues were discovered in kitty, a GPU based terminal emulator, which may result in the execution of arbitrary code, command injection into the shell running in the terminal, or the overwriting of arbitrary files, if untrusted content is displayed in a terminal window.

For the stable distribution (trixie), these problems have been fixed in version 0.41.1-2+deb13u2.

We recommend that you upgrade your kitty packages.

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

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

Solution

Upgrade the kitty packages.

Plugin Details

Severity: High

ID: 333554

File Name: debian_DSA-6423.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 8/9/2026

Updated: 8/9/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.93

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-42850

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

CVSS v4

Risk Factor: High

Base Score: 7.4

Threat Score: 6.5

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:kitty-doc, p-cpe:/a:debian:debian_linux:kitty-shell-integration, p-cpe:/a:debian:debian_linux:kitty-terminfo, p-cpe:/a:debian:debian_linux:kitty

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: 8/9/2026

Vulnerability Publication Date: 6/12/2026

Reference Information

CVE: CVE-2026-42850, CVE-2026-42851, CVE-2026-54055, CVE-2026-54057

Detections

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