CVE-2025-64720-PoC

CVE-2025-64720：libpng 调色板预乘中的缓冲区溢出 状态 ：已修复 严重性 ：高 CVE 标识符 ：CVE-2025-64720 发现日期 ：2025-11-XX 公开披露日期 ：2025-11-21 概述 摘要 在 libpng 的 pngimagereadcomposite 函数中，当处理启用了 PNGFLAGOPTIMIZEALPHA 的调色板图像时，存在一个越界读取漏洞。pnginitreadtransformations 中的调色板合成代码在预乘过程中错误地应用了背景合成，违反了简化 PNG API 所要求的不变性 component ≤ alpha ×...

Security update for libpng15

This update for libpng15 fixes the following issues Security issues: CVE-2025-64720: buffer overflow in pngimagereadcomposite via incorrect palette premultiplication bsc1254159. Non security issue: version update to 1.5.30 jscPED-16191. Changes for libpng15: Replaced "unexpected" with an integer ...

SUSE-SU-2025:4533-1 Security update for libpng16

This update for libpng16 fixes the following issues: - CVE-2025-64720: Fixed buffer overflow in pngimagereadcomposite via incorrect palette premultiplication bsc1254159 - CVE-2025-64505: Fixed heap buffer over-read in pngdoquantize via malformed palette index bsc1254157 - CVE-2025-64506: Fixed he...

Security update for libpng16

This update for libpng16 fixes the following issues: CVE-2025-65018: Fixed heap buffer overflow in pngcombinerow triggered via pngimagefinishread bsc1254160 CVE-2025-66293: Fixed LIBPNG out-of-bounds read in pngimagereadcomposite bsc1254480 CVE-2025-64506: Fixed heap buffer over-read in...

SUSE SLES15: libpng16-16 / libpng16-16-32bit / libpng16-compat-devel / etc (SUSE-SU-2025:4436-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:4436-1 advisory. - CVE-2025-65018: Fixed heap buffer overflow in pngcombinerow triggered via pngimagefinishread bsc1254160 - CVE-2025-66293: Fixed...

Security update for libpng16

This update for libpng16 fixes the following issues: CVE-2025-65018: Fixed heap buffer overflow in pngcombinerow triggered via pngimagefinishread bsc1254160 CVE-2025-66293: Fixed LIBPNG out-of-bounds read in pngimagereadcomposite bsc1254480 CVE-2025-64506: Fixed heap buffer over-read in...

SUSE-SU-2025:4436-1 Security update for libpng16

This update for libpng16 fixes the following issues: - CVE-2025-65018: Fixed heap buffer overflow in pngcombinerow triggered via pngimagefinishread bsc1254160 - CVE-2025-66293: Fixed LIBPNG out-of-bounds read in pngimagereadcomposite bsc1254480 - CVE-2025-64506: Fixed heap buffer over-read in...

SUSE-SU-2025:21217-1 Security update for libpng16

This update for libpng16 fixes the following issues: - CVE-2025-66293: Fixed out-of-bounds read in pngimagereadcomposite bsc1254480. - CVE-2025-64505: Fixed heap buffer over-read in pngdoquantize via malformed palette index bsc1254157. - CVE-2025-64506: Fixed heap buffer over-read in...

SUSE-SU-2025:21220-1 Security update for libpng16

This update for libpng16 fixes the following issues: - CVE-2025-66293: Fixed out-of-bounds read in pngimagereadcomposite bsc1254480. - CVE-2025-64505: Fixed heap buffer over-read in pngdoquantize via malformed palette index bsc1254157. - CVE-2025-64506: Fixed heap buffer over-read in...

LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication

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CVE-2025-64720 LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication

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, an out-of-bounds read vulnerability exists in pngimagereadcomposite when processing palette images with PNGFLAGOPTIMIZEALP...

CVE-2025-64720

Summary (CVE-2025-64720) libpng up to version 1.6.50 contains an out-of-bounds read in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA, due to incorrect background compositing during premultiplication that violates an invariant. The issue is fixed in version 1...

CVE-2025-64720 LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication

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, an out-of-bounds read vulnerability exists in pngimagereadcomposite when processing palette images with PNGFLAGOPTIMIZEALP...

CVE-2025-64720 LIBPNG is vulnerable to a buffer overflow in `png_image_read_composite` via incorrect palette premultiplication

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, an out-of-bounds read vulnerability exists in pngimagereadcomposite when processing palette images with PNGFLAGOPTIMIZEALP...