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Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : kitty vulnerabilities (USN-8442-1)

critical Nessus Plugin ID 321729

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8442-1 advisory.

 It was discovered that kitty incorrectly handled certain image data. An attacker able to write to the terminal's input could possibly use this issue to cause kitty to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-33633)

 It was discovered that kitty incorrectly handled certain graphics commands. An attacker able to write escape sequences to a kitty terminal could possibly use this issue to cause kitty to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-33642)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected kitty, kitty-shell-integration and / or kitty-terminfo packages.

See Also

https://ubuntu.com/security/notices/USN-8442-1

Plugin Details

Severity: Critical

ID: 321729

File Name: ubuntu_USN-8442-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/20/2026

Updated: 6/20/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-33642

CVSS v3

Risk Factor: Critical

Base Score: 9.9

Temporal Score: 8.6

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.10, p-cpe:/a:canonical:ubuntu_linux:kitty-terminfo, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:kitty-shell-integration, p-cpe:/a:canonical:ubuntu_linux:kitty, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2026

Vulnerability Publication Date: 5/19/2026

Reference Information

CVE: CVE-2026-33633, CVE-2026-33642

IAVB: 2026-B-0143

USN: 8442-1