UBUNTU-CVE-2026-33642

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Source
https://ubuntu.com/security/CVE-2026-33642
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-33642
Upstream
Downstream
Related
Published
2026-05-19T19:16:00Z
Modified
2026-06-18T00:30:10Z
Severity
  • 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H CVSS Calculator
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Kitty is a cross-platform GPU based terminal. In versions 0.46.2 and below, the handle_compose_command() function in kitty/graphics.c performs bounds validation on composition offsets using unsigned 32-bit arithmetic that is subject to integer wrapping, potentially leading to Heap Buffer Over-Read/Write. An attacker who can write escape sequences to a kitty terminal (e.g., via a malicious file, SSH login banner, or piped content) can supply crafted x_offset/y_offset values that pass the bounds check after wrapping but cause massive out-of-bounds heap memory access in compose_rectangles(). No user interaction is required. No non-default configuration is required. The attacker only needs the ability to produce output in a kitty terminal window. This issue has been fixed in version 0.47.0.

References

Affected packages

Ubuntu:Pro:20.04:LTS / kitty

Package

Name
kitty
Purl
pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.15.0-1ubuntu0.2+esm1

Affected versions

0.*
0.14.3-1
0.14.4-1
0.14.6-1
0.15.0-1
0.15.0-1build1
0.15.0-1ubuntu0.2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.15.0-1ubuntu0.2+esm1"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.15.0-1ubuntu0.2+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json"

Ubuntu:Pro:22.04:LTS / kitty

Package

Name
kitty
Purl
pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.21.2-1ubuntu0.22.04.1+esm1

Affected versions

0.*
0.19.3-1
0.21.2-1
0.21.2-1build1
0.21.2-1ubuntu0.22.04.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.21.2-1ubuntu0.22.04.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json"

Ubuntu:Pro:24.04:LTS / kitty

Package

Name
kitty
Purl
pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.32.2-1ubuntu0.4+esm1

Affected versions

0.*
0.26.5-3ubuntu2
0.26.5-5ubuntu1
0.31.0-3
0.31.0-4
0.32.2-1
0.32.2-1build2
0.32.2-1build3
0.32.2-1ubuntu0.1
0.32.2-1ubuntu0.2
0.32.2-1ubuntu0.3
0.32.2-1ubuntu0.4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.32.2-1ubuntu0.4+esm1"
        },
        {
            "binary_name": "kitty-shell-integration",
            "binary_version": "0.32.2-1ubuntu0.4+esm1"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.32.2-1ubuntu0.4+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json"

Ubuntu:25.10 / kitty

Package

Name
kitty
Purl
pkg:deb/ubuntu/kitty?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.41.1-2+deb13u1build0.25.10.1

Affected versions

0.*
0.39.1-1
0.41.1-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.41.1-2+deb13u1build0.25.10.1"
        },
        {
            "binary_name": "kitty-shell-integration",
            "binary_version": "0.41.1-2+deb13u1build0.25.10.1"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.41.1-2+deb13u1build0.25.10.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json"

Ubuntu:Pro:26.04:LTS / kitty

Package

Name
kitty
Purl
pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.45.0-1ubuntu0.1~esm1

Affected versions

0.*
0.41.1-2
0.43.1-1
0.44.0-1
0.45.0-1
0.45.0-1build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.45.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kitty-shell-integration",
            "binary_version": "0.45.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.45.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33642.json"