CVE-2025-64720Public exploitNetwork attack vector

Memory disclosure and crash via palette premultiplication

Published Nov 24, 2025 · Updated Nov 25, 2025

Out-of-bounds read in libpng 1.6.0 through 1.6.50 allows remote attackers to disclose memory or crash applications via crafted PNG images. The png_init_read_transformations palette path composites a background while premultiplying alpha, producing an oversized index that png_image_read_composite uses to read beyond png_sRGB_base. Exploitation requires a consuming application to process the image through the simplified API with PNG_FLAG_OPTIMIZE_ALPHA enabled, exposing adjacent memory or terminating the process.

CVSS severity7.1
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in libpng 1.6.0 through 1.6.50 allows remote attackers to disclose memory or crash applications via crafted PNG images. The png_init_read_transformations palette path composites a background while premultiplying alpha, producing an oversized index that png_image_read_composite uses to read beyond png_sRGB_base. Exploitation requires a consuming application to process the image through the simplified API with PNG_FLAG_OPTIMIZE_ALPHA enabled, exposing adjacent memory or terminating the process.

The record

CVE
CVE-2025-64720
Published
Nov 24, 2025
Updated
Nov 25, 2025
Vendor
PNG Development Group
Product
libpng
Classifications
CWE-125
Attack vector
network
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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

7.1GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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