ALPINE-CVE-2025-64506

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2025-64506
Published: 25 Nov 2025, 00:15
Last modified:08 Dec 2025, 15:14

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
6.1 MEDIUM
3.1 (osv_alpine)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Nov 2025, 00:15
Published
Vulnerability first disclosed
08 Dec 2025, 15:14
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•MEDIUM•Score: 6.1CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected Systems

  • alpine•libpng

    < 1.6.53-r0 | < 1.6.53-r0 | < 1.6.51-r0 | < 1.6.51-r0

References (1)