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CVE-2025-65018— LIBPNG is vulnerable to a heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read`

Quick assessment

Affected
pnggroup libpng
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libpng是The PNG Development Group开源的一个可对PNG图形文件实现创建、读写等操作的PNG参考库。 libpng 1.6.0版本至1.6.51之前版本存在缓冲区错误漏洞，该漏洞源于png_image_finish_read函数处理16位交错PNG时存在堆缓冲区溢出，可能导致越界写入。

CVSS 7.1 · High EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-65018

Vulnerability Information
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Vulnerability Title
LIBPNG is vulnerable to a heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read`
Source: CVE Program / CVE List V5
Vulnerability Description
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
libpng 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libpng是The PNG Development Group开源的一个可对PNG图形文件实现创建、读写等操作的PNG参考库。 libpng 1.6.0版本至1.6.51之前版本存在缓冲区错误漏洞，该漏洞源于png_image_finish_read函数处理16位交错PNG时存在堆缓冲区溢出，可能导致越界写入。
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
pnggroup libpng >= 1.6.0, < 1.6.51 -

II. Public POCs for CVE-2025-65018

# POC Description Source Link Shenlong Link
1 None https://github.com/Neo-Neo6/CVE-2025-65018-Heap-buffer-overflow-in-libpng-ps4-ps5- POC Details
2 None https://github.com/bohemian-miser/CVE-2025-65018_Exploit_Challenge POC Details
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Qwen3.6-35B-A3B · 12865 chars
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III. Intelligence Information for CVE-2025-65018

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Patches & Fixes for CVE-2025-65018 (2)

Vendor Advisories for CVE-2025-65018 (1)

Same Patch Batch · pnggroup · 2025-11-24 · 4 CVEs total

CVE-2025-64720 7.1 HIGH LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect pale
CVE-2025-64506 6.1 MEDIUM LIBPNG is vulnerable to a heap buffer over-read in `png_write_image_8bit` with grayscale+a
CVE-2025-64505 6.1 MEDIUM LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette

IV. Related Vulnerabilities

Same product: libpng
Same vendor: pnggroup
Same weakness: CWE-787