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CVE-2025-9300— saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow

Quick assessment

Affected
saitoha libsixel
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libsixel是Hayaki Saito个人开发者的一个为DEC SIXEL图形和其他转换器程序提供编码/解码实现的软件包。 libsixel 1.10.3及之前版本存在安全漏洞，该漏洞源于栈缓冲区溢出。

CVSS 5.3 · Medium EPSS 0.24% · P16
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I. Basic Information for CVE-2025-9300

Vulnerability Information
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Vulnerability Title
saitoha libsixel img2sixel encoder.c sixel_debug_print_palette stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
libsixel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsixel是Hayaki Saito个人开发者的一个为DEC SIXEL图形和其他转换器程序提供编码/解码实现的软件包。 libsixel 1.10.3及之前版本存在安全漏洞，该漏洞源于栈缓冲区溢出。
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

Vendor Product Affected Versions CPE Subscribe
saitoha libsixel 1.10.0 -

II. Public POCs for CVE-2025-9300

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III. Intelligence Information for CVE-2025-9300

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Vendor Advisories for CVE-2025-9300 (1)

Proof of Concept for CVE-2025-9300 (1)

Other References for CVE-2025-9300 (1)

IV. Related Vulnerabilities

Same product: libsixel
Same vendor: saitoha
Same weakness: CWE-121

V. Comments for CVE-2025-9300

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