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libpng

This update includes the following RPMs:

libpng:
  * libpng-1.6.56-1.hum1 (aarch64, x86_64)
  * libpng-devel-1.6.56-1.hum1 (aarch64, x86_64)
  * libpng-static-1.6.56-1.hum1 (aarch64, x86_64)
  * libpng-tools-1.6.56-1.hum1 (aarch64, x86_64)
  * libpng-1.6.56-1.hum1.src (source)

The vulnerability (CVE-2025-65018) is a heap buffer overflow in the libpng library's png_image_finish_read function triggered by processing 16-bit interlaced PNG images with an 8-bit output format. This causes heap writes beyond allocated buffer bounds, potentially allowing an attacker to crash applications or execute arbitrary code. The issue affects Red Hat Hardened Images RPMs including libpng-1.6.56-1.hum1 for aarch64 and x86_64 architectures. Red Hat classifies this as an important vulnerability with a CVSS v3 base score of 7.1 (local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, high integrity and availability impact). No official patch or mitigation is currently available that meets Red Hat's standards for deployment and stability. The vulnerability is tracked under Red Hat Advisory RHSA-2026:6732 and is part of a set of related CVEs addressed in this advisory.

Detailed information about Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update affecting Red Hat Product Security Red Hat. Ge

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update - Live Threat Intelligence - Threat Radar | OffSeq.com

https://access.redhat.com/errata/RHSA-2026:6732

https://images.redhat.com/

https://access.redhat.com/security/cve/CVE-2025-65018

https://access.redhat.com/security/updates/classification/

https://access.redhat.com/security/cve/CVE-2025-64720

https://access.redhat.com/security/cve/CVE-2025-64506

https://access.redhat.com/security/cve/CVE-2025-64505

https://access.redhat.com/security/cve/CVE-2026-22801

https://access.redhat.com/security/cve/CVE-2026-22695

https://access.redhat.com/security/cve/CVE-2025-28164

https://access.redhat.com/security/cve/CVE-2025-28162

https://access.redhat.com/security/cve/CVE-2026-33636

https://access.redhat.com/security/cve/CVE-2026-33416

https://access.redhat.com/security/cve/CVE-2025-66293

https://access.redhat.com/security/cve/CVE-2026-3713

https://access.redhat.com/security/cve/CVE-2026-25646

Canonical URL

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

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 trigger out-of-bounds memory access. This issue has been patched in version 1.6.51.

CVE-2025-64505 is a heap buffer over-read vulnerability identified in the widely used libpng library, specifically in versions prior to 1.6.51. Libpng is a reference library for reading, creating, and manipulating PNG images, integral to many software applications across platforms. The vulnerability exists in the png_do_quantize function, which handles color quantization by mapping image palette indices. The flaw arises because the function does not properly validate the bounds of the palette_lookup array against externally supplied image data. An attacker can exploit this by crafting a PNG file with palette indices that exceed the valid range, causing the function to read memory beyond the allocated buffer. This out-of-bounds read can lead to application instability, crashes, or denial of service conditions. The CVSS 3.1 base score is 6.1 (medium severity), reflecting that exploitation requires local access (AV:L), low attack complexity (AC:L), no privileges (PR:N), but user interaction (UI:R) is necessary, and the impact is limited to confidentiality loss (C:L) and availability (A:H) without integrity impact. No known exploits have been reported in the wild as of publication. The vulnerability was patched in libpng version 1.6.51, which includes proper bounds checking to prevent out-of-bounds reads. Applications that embed or link against vulnerable libpng versions are at risk when processing untrusted PNG files, especially in environments where users might open images from external sources. This vulnerability highlights the importance of validating image data and promptly applying upstream library patches.

Detailed information about CVE-2025-64505: CWE-125: Out-of-bounds Read in pnggroup libpng affecting pnggroup libpng. Get real-time updates, technical details, a

CVE-2025-64505: CWE-125: Out-of-bounds Read in pnggroup libpng - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-64505: CWE-125: Out-of-bounds Read in pnggroup libpng


Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement updateCVE-2025-28162 0 This update includes the following RPMs: libpng: * libpng-1.6.56-1.hum1 (aarch64, x86_64) * libpng-devel-1.6.56-1.hum1 (aarch64, x86_64) * libpng-static-1.6.56-1.hum1 (aarch64, x86_64) * libpng-tools-1.6.56-1.hum1 (aarch64, x86_64) * libpng-1.6.56-1.hum1.src (source) HighVulnerability#gcve #csaf #cve-2025-28162 Join the discussion	GCVE Database	04/07/2026, 06:21:37 UTC Added: 05/26/2026, 20:58:48 UTC
CVE-2025-64505: CWE-125: Out-of-bounds Read in pnggroup libpngCVE-2025-64505 0 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 trigger out-of-bounds memory access. This issue has been patched in version 1.6.51. MediumVulnerabilityGermanyFranceUnited Kingdom+4#cve #cve-2025-64505 #cwe-125 Join the discussion	CVE Database V5	11/24/2025, 23:38:40 UTC Added: 11/24/2025, 23:53:01 UTC

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