Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check_CVE-2026-33642

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-05-19T18:04:42.482Z",
    "modified": "2026-05-19T18:04:42.482Z",
    "type": "cve",
    "title": "Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check",
    "source": "GitHub_M",
    "references": "https://github.com/kovidgoyal/kitty/security/advisories/GHSA-qfgm-2c64-6x3x\nhttps://github.com/kovidgoyal/kitty/commit/e9661f0f3afb4e4dbffa509adfb3df3c9780ad34",
    "id": "CVE-2026-33642",
    "bulletinFamily": "",
    "cwe": [
        "CWE-190",
        "CWE-787",
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "kovidgoyal kitty < 0.47.0",
    "sourceHref": "",
    "cvss": {
        "score": 9.9,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "kitty",
    "version": "< 0.47.0",
    "vendor": "kovidgoyal",
    "ai_description": "Heap Buffer Over-Read/Write via integer overflow in compose_rectangles bounds check",
    "ai_severity": "Critical",
    "ai_vendor": "kovidgoyal",
    "ai_product": "kitty",
    "ai_version": "0.46.2 and below",
    "ai_score": 9.9
}