CVE-2026-42046— libcaca: Heap OOB write in canvas import functions caused by int overflow
Possible ATT&CK Techniques 3AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing ApplicationGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-42046
Vulnerability Information
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Vulnerability Title
libcaca: Heap OOB write in canvas import functions caused by int overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
libcaca is a colour ASCII art library. In 0.99.beta20 and earlier, an integer overflow vulnerability in libcaca's canvas import functionality allows an attacker to cause a controlled heap out-of-bounds write (heap overflow) by supplying a crafted file in the "caca" format. Depending on the build configuration and memory allocator, this may lead to memory corruption or remote code execution. This is the same vulnerability as CVE-2021-3410 but the fix at that time was not fully correct. Commit fb77acff9ba6bb01d53940da34fb10f20b156a23 fixes this vulnerability.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
libcaca 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libcaca是cacalabs开源的一个软件库。可将图像转换为彩色ASCII艺术品。 libcaca 0.99.beta20及之前版本存在安全漏洞，该漏洞源于画布导入功能中的整数溢出，可能导致攻击者通过提供特制的caca格式文件造成堆越界写入，进而导致内存损坏或远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-42046
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Other · 1Advisory · 1Patch · 1
IV. Related Vulnerabilities
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