DEBIAN-CVE-2025-64720

Advisory lineage Upstream: 1 Downstream: 2
Upstream
CVE-2025-64720
Published: 25 Nov 2025, 00:15
Last modified:10 Dec 2025, 11:15

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
3.1 (osv_debian)
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
10 Dec 2025, 11:15
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, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component ≤ alpha × 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Affected Systems

  • debian•libpng1.6

    < 1.6.37-3+deb11u1 | < 1.6.39-2+deb12u1 | < 1.6.48-1+deb13u1 | < 1.6.51-1

References (1)