CVE-2025-64505 — Out-of-bounds Read in Libpng

CWE-125 — Out-of-bounds Read11 documents8 sources
Severity
6.1MEDIUMNVD
EPSS
0.0%
top 92.80%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Pnggroup LibpngLibpng
Timeline
PublishedNov 25
Latest updateMar 11

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that…

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:HExploitability: 1.8 | Impact: 4.2

Affected Packages3 packages

▶NVDlibpng/libpng< 1.6.51
▶CVEListV5pnggroup/libpng< 1.6.51
▶Ubuntulibpng/libpng< 1.2.50-1ubuntu2.14.04.3+esm1+1

Patches

Patch: github.com ↗

🔴Vulnerability Details

4
OSV
libpng vulnerabilities↗2026-03-11
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OSV
libpng1.6 vulnerabilities↗2025-12-11
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OSV
CVE-2025-64505: LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files↗2025-11-25
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CVEList
LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index↗2025-11-24
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📋Vendor Advisories

5
Ubuntu
libpng vulnerabilities↗2026-03-11
▶
Ubuntu
libpng vulnerabilities↗2025-12-11
▶
Red Hat
libpng: LIBPNG heap buffer overflow via malformed palette index↗2025-11-24
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Microsoft
LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index↗2025-11-11
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Debian
CVE-2025-64505: libpng1.6 - LIBPNG is a reference library for use in applications that read, create, and man...↗2025
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💬Community

1
Bugzilla
CVE-2025-64505 libpng: LIBPNG heap buffer overflow via malformed palette index↗2025-11-25
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