CVE-2025-64506

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

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, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

November 25, 2025

Last Modified

June 17, 2026

References (3)

Vendor Advisories for CVE-2025-64506(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibpng16-16t64 (1.6.50-1ubuntu0.1) @ questing2026-05-29ubuntu
redhatlibpng-main-1.6.56-1.hum12026-04-07redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
libpng—1.6.53-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libpng—1.6.53-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libpng—1.6.51-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libpng—1.6.51-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libpng—1.6.51-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libpng1.61.6.37-31.6.37-3+deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libpng1.61.6.39-21.6.39-2+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libpng1.61.6.48-11.6.48-1+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libpng1.61.6.48-1, 1.6.49-1~exp1, 1.6.50-1, 1.6.50-1~exp11.6.51-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 132 total refreshes for this CVE.

  1. 2026-08-30 19:16 UTCEPSS rescore
  2. 2026-08-30 01:21 UTCEPSS rescore
  3. 2026-08-28 21:40 UTCEPSS rescore
  4. 2026-08-27 14:24 UTCEPSS rescore
  5. 2026-08-26 14:45 UTCEPSS rescore
  6. 2026-08-25 13:48 UTCEPSS rescore
  7. 2026-08-24 15:02 UTCOSV refresh
  8. 2026-08-24 14:16 UTCEPSS rescore
  9. 2026-08-23 00:18 UTCEPSS rescore
  10. 2026-08-21 23:48 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
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  25. 2026-08-08 16:36 UTCEPSS rescore
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  1. 2026-08-08 09:27 UTCEG score recompute
  2. 2026-08-08 09:27 UTCVendor advisory
  3. 2026-08-07 16:26 UTCEPSS rescore
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-05 19:17 UTCEPSS rescore
  6. 2026-08-05 19:17 UTCEPSS rescore
  7. 2026-08-04 15:09 UTCEPSS rescore
  8. 2026-08-04 10:37 UTCEPSS rescore
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  10. 2026-08-02 02:26 UTCEPSS rescore
  11. 2026-08-01 04:15 UTCEPSS rescore
  12. 2026-07-30 16:27 UTCEPSS rescore
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  14. 2026-07-28 15:35 UTCEPSS rescore
  15. 2026-07-27 14:12 UTCEPSS rescore
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  18. 2026-07-24 14:17 UTCEPSS rescore
  19. 2026-07-24 14:17 UTCEPSS rescore
  20. 2026-07-23 14:41 UTCOSV refresh
  21. 2026-07-23 14:18 UTCEPSS rescore
  22. 2026-07-23 14:18 UTCEPSS rescore
  23. 2026-07-23 03:01 UTCEG score recompute
  24. 2026-07-22 14:08 UTCEPSS rescore
  25. 2026-07-21 15:24 UTCEPSS rescore
  26. 2026-07-20 17:08 UTCEPSS rescore
  27. 2026-07-19 14:30 UTCEPSS rescore
  28. 2026-07-19 14:30 UTCEPSS rescore
  29. 2026-07-19 02:28 UTCEPSS rescore
  30. 2026-07-18 10:04 UTCEPSS rescore
  31. 2026-07-18 10:04 UTCEPSS rescore
  32. 2026-07-16 17:02 UTCEPSS rescore
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  35. 2026-07-15 01:59 UTCEPSS rescore
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  37. 2026-07-13 22:29 UTCEPSS rescore
  38. 2026-07-13 06:12 UTCEPSS rescore
  39. 2026-07-11 08:27 UTCEPSS rescore
  40. 2026-07-09 19:09 UTCEPSS rescore
  41. 2026-07-08 15:15 UTCEPSS rescore
  42. 2026-07-07 13:46 UTCEPSS rescore
  43. 2026-07-06 16:27 UTCEPSS rescore
  44. 2026-07-06 16:27 UTCEPSS rescore
  45. 2026-07-06 09:11 UTCOSV refresh
  46. 2026-07-06 02:23 UTCEPSS rescore
  47. 2026-07-06 02:23 UTCEPSS rescore
  48. 2026-07-05 02:30 UTCEPSS rescore
  49. 2026-07-05 02:30 UTCEPSS rescore
  50. 2026-07-04 06:31 UTCEPSS rescore
  51. 2026-07-04 06:30 UTCEPSS rescore
  52. 2026-07-01 15:06 UTCEPSS rescore
  53. 2026-07-01 15:06 UTCEPSS rescore
  54. 2026-06-30 23:22 UTCEPSS rescore
  55. 2026-06-29 14:06 UTCEPSS rescore
  56. 2026-06-29 14:06 UTCEPSS rescore
  57. 2026-06-28 14:07 UTCEPSS rescore
  58. 2026-06-28 14:07 UTCEPSS rescore
  59. 2026-06-27 03:08 UTCEPSS rescore
  60. 2026-06-25 13:49 UTCEPSS rescore
  61. 2026-06-23 21:32 UTCEPSS rescore
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  63. 2026-06-22 14:25 UTCEPSS rescore
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  67. 2026-06-21 01:59 UTCEPSS rescore
  68. 2026-06-19 19:25 UTCEPSS rescore
  69. 2026-06-19 19:25 UTCEPSS rescore
  70. 2026-06-18 17:52 UTCEPSS rescore
  71. 2026-06-18 17:52 UTCEPSS rescore
  72. 2026-06-17 21:13 UTCOSV refresh
  73. 2026-06-17 17:52 UTCEPSS rescore
  74. 2026-06-16 17:52 UTCEPSS rescore
  75. 2026-06-15 17:48 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-64506?
CVE-2025-64506 is a medium vulnerability published on November 25, 2025. 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, a heap buffer over-read vulnerability exists in libpng's pngwriteimage8bit function when processing 8-bit images through…
When was CVE-2025-64506 disclosed?
CVE-2025-64506 was first published in the National Vulnerability Database on November 25, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-64506 actively exploited?
CVE-2025-64506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.4% of all scored CVEs.
What is the CVSS score of CVE-2025-64506?
CVE-2025-64506 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2025-64506?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-64506, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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