UBUNTU-CVE-2026-54055

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Source
https://ubuntu.com/security/CVE-2026-54055
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54055.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-54055
Upstream
Downstream
Related
Published
2026-06-12T20:16:00Z
Modified
2026-09-15T20:16:36Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.2, a local privilege escalation vulnerability exists in kitty's file transmission protocol where a child process running in the terminal can write to arbitrary files on the filesystem by exploiting a TOCTOU (Time-of-Check-Time-of-Use) race condition between symlink validation and file creation. The os.open() call used to create files does not use O_NOFOLLOW, allowing an attacker to create a symlink between the initial stat check and the actual file open, causing the write to follow the symlink to an arbitrary destination. Version 0.47.2 fixes the issue.

References

Affected packages

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+esm2

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
0.32.2-1ubuntu0.4+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.32.2-1ubuntu0.4+esm2"
        },
        {
            "binary_name": "kitty-shell-integration",
            "binary_version": "0.32.2-1ubuntu0.4+esm2"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.32.2-1ubuntu0.4+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54055.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

Affected versions

0.*
0.39.1-1
0.41.1-2
0.41.1-2+deb13u1build0.25.10.1

Ecosystem specific 

{
    "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-2026-54055.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~esm2

Affected versions

0.*
0.41.1-2
0.43.1-1
0.44.0-1
0.45.0-1
0.45.0-1build1
0.45.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "kitty",
            "binary_version": "0.45.0-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "kitty-shell-integration",
            "binary_version": "0.45.0-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "kitty-terminfo",
            "binary_version": "0.45.0-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54055.json"