{"id":87194,"date":"2026-07-14T12:49:46","date_gmt":"2026-07-14T12:49:46","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-29069-heap-buffer-overflow-vulnerability-in-lcms2-2-16","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29069-heap-buffer-overflow-vulnerability-in-lcms2-2-16\/","title":{"rendered":"CVE-2025-29069: Heap Buffer Overflow Vulnerability in lcms2-2.16<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

A critical heap buffer overflow vulnerability, identified as CVE-2025-29069, has been discovered in the lcms2-2.16. This vulnerability could potentially lead to system compromise or data leakage. The issue arises in the UnrollChunkyBytes function of cmspack.c, which is in charge of handling color space transformations. This vulnerability has a significant impact on any entities using this version of lcms2 due to the potential breach of security and data integrity.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-29069
\nSeverity: High (7.3 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

lcms2 | 2.16<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The heap buffer overflow vulnerability in lcms2-2.16 exists due to insufficient boundary checks during color space transformations. An attacker could exploit this vulnerability by sending specially crafted data to the affected application, which when processed by the UnrollChunkyBytes function in cmspack.c, would lead to a buffer overflow. This overflow could potentially allow the attacker to execute arbitrary code and compromise the system or lead to data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of how an attacker might exploit this vulnerability:<\/p>\n

POST \/lcms2\/process_color HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/octet-stream\n{ \"color_data\": \"OVERFLOWING_BYTE_STREAM\" }<\/code><\/pre>\n
In this example, the “color_data” field contains a byte stream that is longer than what the application can handle, leading to a buffer overflow when it attempts to process this data.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical heap buffer overflow vulnerability, identified as CVE-2025-29069, has been discovered in the lcms2-2.16. This vulnerability could potentially lead to system compromise or data leakage. The issue arises in the UnrollChunkyBytes function of cmspack.c, which is in charge of handling color space transformations. This vulnerability has a significant impact on any entities using […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87194","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t