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SUSE: libpng16 Important Buffer Overflow Fix Advisory 2025:21217-1

suse
Calendar Grey December 18, 2025
Dist Suse Esm H88
Important security update for libpng16 on SUSE addressing multiple vulnerabilities with effective solutions.
An update that solves five vulnerabilities can now be installed.

Summary

## This update for libpng16 fixes the following issues: * CVE-2025-66293: Fixed out-of-bounds read in png_image_read_composite (bsc#1254480). * CVE-2025-64505: Fixed heap buffer over-read in `png_do_quantize` via malformed palette index (bsc#1254157). * CVE-2025-64506: Fixed heap buffer over-read in `png_write_image_8bit` with 8-bit input and `convert_to_8bit` enabled (bsc#1254158). * CVE-2025-64720: Fixed buffer overflow in `png_image_read_composite` via incorrect palette premultiplication (bsc#1254159). * CVE-2025-65018: Fixed heap buffer overflow in `png_combine_row` triggered via `png_image_finish_read` (bsc#1254160). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important heap overflow libpng16

References

* bsc#1254157

* bsc#1254158

* bsc#1254159

* bsc#1254160

* bsc#1254480

Cross-

* CVE-2025-64505

* CVE-2025-64506

* CVE-2025-64720

* CVE-2025-65018

* CVE-2025-66293

CVSS scores:

* CVE-2025-64505 ( SUSE ): 6.9

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2025-64505 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

* CVE-2025-64505 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

* CVE-2025-64506 ( SUSE ): 6.9

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

* CVE-2025-64506 ( SUSE ): 6.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

* CVE-2025-64506 ( NVD ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

* CVE-2025-64720 ( SUSE ): 6.9

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2025:21217-1
Release Date: 2025-12-16T08:33:05Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important heap overflow libpng16

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