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SUSE: libpng16 Important Buffer Overflow Fix 2025:21220-1

suse
Calendar Grey December 18, 2025
Dist Suse Esm H88
Ensure security with SUSE's important libpng16 update addressing critical buffer over-read and overflow issues.
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 over-read 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-2025:21220-1
Release Date: 2025-12-16T08:25:26Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important heap over-read libpng16

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