CVE-2025-65018Public exploit

Heap corruption via interlaced 16-to-8-bit row conversion

Published Nov 24, 2025 · Updated Nov 25, 2025

Heap buffer overflow in libpng 1.6.0 through 1.6.50 allows attackers to corrupt memory via a crafted 16-bit interlaced PNG. During png_image_finish_read, png_combine_row writes rows at the 16-bit IHDR depth into a heap buffer sized for the requested 8-bit output. Exposure requires an application to use the simplified API for untrusted images and request 8-bit output; successful triggering corrupts its heap and deterministically crashes the process.

CVSS severity7.1
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in libpng 1.6.0 through 1.6.50 allows attackers to corrupt memory via a crafted 16-bit interlaced PNG. During png_image_finish_read, png_combine_row writes rows at the 16-bit IHDR depth into a heap buffer sized for the requested 8-bit output. Exposure requires an application to use the simplified API for untrusted images and request 8-bit output; successful triggering corrupts its heap and deterministically crashes the process.

The record

CVE
CVE-2025-65018
Published
Nov 24, 2025
Updated
Nov 25, 2025
Vendor
PNG Development Group
Product
libpng
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.6.0, < 1.6.51

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

PNG Development Group · libpngversion=>= 1.6.0, < 1.6.51

Published CVSS scores

7.1GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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