Security update for libpng16
Multiple heap buffer over-read and out-of-bounds read vulnerabilities have been identified in libpng16, affecting functions that process malformed or specially crafted PNG images. These issues can lead to memory corruption or crashes when handling certain palette indices, 8-bit input with specific conversion enabled, palette images with alpha optimization, 16-bit interlaced PNGs with 8-bit output, and palette PNGs with partial transparency and gamma correction. The vulnerabilities are collectively rated as high severity. No explicit patch or remediation details are provided in the input data.
AI Analysis
Technical Summary
This security update for libpng16 addresses several vulnerabilities: CVE-2025-64505 involves a heap buffer over-read in the png_do_quantize function when processing PNG files with malformed palette indices. CVE-2025-64506 is a heap buffer over-read in png_write_image_8bit when processing 8-bit input with convert_to_8bit enabled. CVE-2025-64720 is an out-of-bounds read in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. CVE-2025-65018 is a heap buffer overflow in png_image_finish_read when processing specially crafted 16-bit interlaced PNGs with 8-bit output format. CVE-2025-66293 is an out-of-bounds read of the png_sRGB_base array when processing palette PNG images with partial transparency and gamma correction. These vulnerabilities can cause memory corruption or crashes during PNG image processing.
Potential Impact
The vulnerabilities can lead to heap buffer over-reads, out-of-bounds reads, and heap buffer overflows during processing of malformed or specially crafted PNG images. This may result in application crashes or memory corruption, potentially affecting the stability and security of applications using libpng16 for image processing. No information about exploitation in the wild is available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted or malformed PNG images with affected libpng16 versions. Monitor vendor communications for updates on patches or mitigations.
Security update for libpng16
Description
Multiple heap buffer over-read and out-of-bounds read vulnerabilities have been identified in libpng16, affecting functions that process malformed or specially crafted PNG images. These issues can lead to memory corruption or crashes when handling certain palette indices, 8-bit input with specific conversion enabled, palette images with alpha optimization, 16-bit interlaced PNGs with 8-bit output, and palette PNGs with partial transparency and gamma correction. The vulnerabilities are collectively rated as high severity. No explicit patch or remediation details are provided in the input data.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This security update for libpng16 addresses several vulnerabilities: CVE-2025-64505 involves a heap buffer over-read in the png_do_quantize function when processing PNG files with malformed palette indices. CVE-2025-64506 is a heap buffer over-read in png_write_image_8bit when processing 8-bit input with convert_to_8bit enabled. CVE-2025-64720 is an out-of-bounds read in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. CVE-2025-65018 is a heap buffer overflow in png_image_finish_read when processing specially crafted 16-bit interlaced PNGs with 8-bit output format. CVE-2025-66293 is an out-of-bounds read of the png_sRGB_base array when processing palette PNG images with partial transparency and gamma correction. These vulnerabilities can cause memory corruption or crashes during PNG image processing.
Potential Impact
The vulnerabilities can lead to heap buffer over-reads, out-of-bounds reads, and heap buffer overflows during processing of malformed or specially crafted PNG images. This may result in application crashes or memory corruption, potentially affecting the stability and security of applications using libpng16 for image processing. No information about exploitation in the wild is available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted or malformed PNG images with affected libpng16 versions. Monitor vendor communications for updates on patches or mitigations.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- SUSE Product Security Team
- Advisory Id
- openSUSE-SU-2026:20017-1
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-64506","CVE-2025-64720","CVE-2025-65018","CVE-2025-66293"]
- State
- PUBLISHED
Threat ID: 6aab49bc55bf5e2cf5992a6d
Added to database: 09/17/2026, 02:00:28 UTC
Last enriched: 09/17/2026, 02:46:31 UTC
Last updated: 09/17/2026, 02:46:31 UTC
Views: 5
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