Unrated severityNVD Advisory· Published Nov 24, 2025· Updated Nov 25, 2025
LIBPNG is vulnerable to a heap buffer over-read in `png_write_image_8bit` with grayscale+alpha or RGB/RGBA images
CVE-2025-64506
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.
AI Insight
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Affected products
31- osv-coords29 versionspkg:rpm/opensuse/libpng16&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/libpng16&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/libpng16&distro=openSUSE%20Tumbleweedpkg:rpm/suse/libpng16&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Micro%205.2pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Micro%205.3pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Micro%205.4pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/libpng16&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/libpng16&distro=SUSE%20Manager%20Proxy%20LTS%204.3pkg:rpm/suse/libpng16&distro=SUSE%20Manager%20Server%20LTS%204.3
< 1.6.40-150600.3.3.1+ 28 more
- (no CPE)range: < 1.6.40-150600.3.3.1
- (no CPE)range: < 1.6.44-160000.3.1
- (no CPE)range: < 1.6.51-1.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.40-150600.3.3.1
- (no CPE)range: < 1.6.40-150600.3.3.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.44-160000.3.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.44-160000.3.1
- (no CPE)range: < 1.6.8-15.9.1
- (no CPE)range: < 1.6.43-2.1
- (no CPE)range: < 1.6.43-slfo.1.1_2.1
- (no CPE)range: < 1.6.44-160000.3.1
- (no CPE)range: < 1.6.34-150000.3.12.1
- (no CPE)range: < 1.6.34-150000.3.12.1
Patches
Vulnerability mechanics
References
3- github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821mitrex_refsource_MISC
- github.com/pnggroup/libpng/pull/749mitrex_refsource_MISC
- github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6mitrex_refsource_CONFIRM
News mentions
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