UBUNTU-CVE-2026-33633 (CVE-2026-33633)
Vulnerability from osv_ubuntu – Published: 2026-05-19 18:16 – Updated: 2026-06-17 22:31 – Source website
VLAI
Details
Kitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in load_image_data() that allows any process which can write to the terminal's stdin to crash kitty immediately. The vulnerability is triggered by a single APC graphics protocol command with a PNG format declaration (f=100) whose payload exceeds twice the initial buffer capacity. The overflow is attacker-controlled in both length and content, causing DoS and potentially escalation to RCE itself. This issue has been fixed in version 0.47.0.
Severity
7.5 (High)
8.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "kitty",
"purl": "pkg:deb/ubuntu/kitty@0.15.0-1ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.15.0-1ubuntu0.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "0.21.2-1ubuntu0.22.04.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "kitty",
"purl": "pkg:deb/ubuntu/kitty@0.21.2-1ubuntu0.22.04.1+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.21.2-1ubuntu0.22.04.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "0.32.2-1ubuntu0.4+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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "kitty",
"purl": "pkg:deb/ubuntu/kitty@0.32.2-1ubuntu0.4+esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.32.2-1ubuntu0.4+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"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": "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"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "kitty",
"purl": "pkg:deb/ubuntu/kitty@0.41.1-2+deb13u1build0.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.41.1-2+deb13u1build0.25.10.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.39.1-1",
"0.41.1-2"
]
},
{
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "kitty",
"purl": "pkg:deb/ubuntu/kitty@0.45.0-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.45.0-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.41.1-2",
"0.43.1-1",
"0.44.0-1",
"0.45.0-1",
"0.45.0-1build1"
]
}
],
"aliases": [],
"details": "Kitty is a cross-platform GPU based terminal. Versions 0.46.2 and below contain a heap buffer overflow in load_image_data() that allows any process which can write to the terminal\u0027s stdin to crash kitty immediately. The vulnerability is triggered by a single APC graphics protocol command with a PNG format declaration (f=100) whose payload exceeds twice the initial buffer capacity. The overflow is attacker-controlled in both length and content, causing DoS and potentially escalation to RCE itself. This issue has been fixed in version 0.47.0.",
"id": "UBUNTU-CVE-2026-33633",
"modified": "2026-06-17T22:31:50Z",
"published": "2026-05-19T18:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-33633"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-33633"
},
{
"type": "REPORT",
"url": "https://github.com/kovidgoyal/kitty/commit/e9661f0f3afb4e4dbffa509adfb3df3c9780ad34"
},
{
"type": "REPORT",
"url": "https://github.com/kovidgoyal/kitty/security/advisories/GHSA-j68c-v8x4-269g"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8442-1"
}
],
"related": [
"USN-8442-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-33633"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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