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CVE-2025-65018

HighPublished

LIBPNG is vulnerable to a heap buffer overflow in png_combine_row triggered via png_image_finish_read

Published: Nov 24, 2025
Updated: Nov 25, 2025
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

7.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 17.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-65018_Exploit_ChallengePoC
CTF challenge exploiting a heap overflow in libpng's png_image_finish_read to overwrite a function pointer and spawn a shell, with build scripts and exploit generator.
CVE-2025-65018-Heap-buffer-overflow-in-libpng-ps4-ps5-PoC
Proof-of-concept exploit for a heap buffer overflow in libpng on PS4/PS5. Generates a malicious PNG that triggers the vulnerability when opened in the gallery via FTP replacement.

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