CVE-2025-64506

MEDIUMPre-NVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.1Exploit: None knownExposed services: Not assessed

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
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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 (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
libpng—
  • 1.6.0 up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • 1.6.0 up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • 1.6.0 up to 1.6.51-r0: fixed in 1.6.51-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • 1.6.0 up to 1.6.51-r0: fixed in 1.6.51-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • 1.6.0 up to 1.6.51-r0: fixed in 1.6.51-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.37-3
  • every version up to 1.6.37-3+deb11u1: fixed in 1.6.37-3+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.39-2
  • every version up to 1.6.39-2+deb12u1: fixed in 1.6.39-2+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1
  • every version up to 1.6.48-1+deb13u1: fixed in 1.6.48-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1, 1.6.49-1~exp1, 1.6.50-1, 1.6.50-1~exp1
  • every version up to 1.6.51-1: fixed in 1.6.51-1
—

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 11× in last 7d / 30× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 90 of 165 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 10 repeat rows among the latest 100 are merged into the row they repeat. The 75 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-12 16:49 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-11 20:24 UTCEG score recompute
  7. 2026-10-11 18:36 UTCEG score recompute
  8. 2026-10-11 15:11 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-01 10:10 UTCOSV refresh
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 65 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-09-19 15:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-09-12 09:53 UTCOSV refresh
  10. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-08-24 15:02 UTCOSV refresh
  24. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  27. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  28. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  32. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  36. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  37. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  38. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  39. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-08-08 09:27 UTCEG score recompute
  41. 2026-08-08 09:27 UTCVendor advisory
  42. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  43. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  45. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  46. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  47. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  50. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  51. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  52. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  53. 2026-07-27 14:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  54. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  55. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  56. 2026-07-23 14:41 UTCOSV refresh
  57. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  58. 2026-07-23 03:01 UTCEG score recompute
  59. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  60. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  61. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  65. 2026-07-16 17:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-64506?
CVE-2025-64506 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2025-64506 published?
The CVE record for CVE-2025-64506 was published on November 25, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2025-64506 actively exploited?
CVE-2025-64506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-64506?
CVE-2025-64506 has a CVSS base score of 6.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-64506?
A fix for CVE-2025-64506 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-64506 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-64506

Explore →

Is Your Infrastructure Affected by CVE-2025-64506?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs