CVE-2026-33642
- Source
- https://cve.org/CVERecord?id=CVE-2026-33642
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33642.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-33642
- Aliases
-
- GHSA-qfgm-2c64-6x3x
- Downstream
- Published
- 2026-05-19T18:04:42.482Z
- Modified
- 2026-07-08T08:12:41.296311479Z
- 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
- Summary
- Kitty has a Heap Buffer Over-Read/Write via Integer Overflow in compose_rectangles Bounds Check
- Details
-
Kitty is a cross-platform GPU based terminal. In versions 0.46.2 and below, the handlecomposecommand() 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 xoffset/yoffset 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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-125", "CWE-190", "CWE-787" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33642.json" }- References
Affected packages
Git / github.com/kovidgoyal/kitty
Affected ranges
- Type
- GIT
- Repo
- https://github.com/kovidgoyal/kitty
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
{ "source": [ "CPE_RANGE", "REFERENCES" ], "extracted_events": [ { "introduced": "0" }, { "fixed": "0.47.0" } ], "cpe": "cpe:2.3:a:kovidgoyal:kitty:*:*:*:*:*:*:*:*" }