{
  "document": {
    "aggregate_severity": {
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
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      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "CVE-2025-64505: heap buffer over-read in png_do_quantize()\n- CVE-2026-34757: use-after-free in png_set_PLTE() and related setters",
        "title": "Details"
      }
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      }
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      "id": "CLSA-2026:1792506818",
      "initial_release_date": "2026-10-20T14:34:25Z",
      "revision_history": [
        {
          "date": "2026-10-20T14:34:25Z",
          "number": "1",
          "summary": "Initial version"
        }
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      "status": "final",
      "version": "1"
    },
    "title": "libpng15: Fix of 2 CVEs"
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  "vulnerabilities": [
    {
      "cve": "CVE-2025-64505",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        }
      ],
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          "Rocky Linux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.x86_64"
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          "url": "https://cve.tuxcare.com/els/cve/CVE-2025-64505"
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        {
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          "summary": "https://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37",
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        },
        {
          "category": "external",
          "summary": "https://github.com/pnggroup/libpng/pull/748",
          "url": "https://github.com/pnggroup/libpng/pull/748"
        },
        {
          "category": "external",
          "summary": "https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42",
          "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42"
        }
      ],
      "release_date": "2025-11-25T00:15:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-20T14:33:40.225201Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1792506818",
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            "AlmaLinux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.aarch64",
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            "AlmaLinux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.x86_64",
            "Rocky Linux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.aarch64",
            "Rocky Linux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.i686",
            "Rocky Linux-9.8:libpng15-0:1.5.30-15.el9_8.1.tuxcare.els1.x86_64"
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      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
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        {
          "category": "description",
          "text": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get_hIST back into the corresponding setter on the same png_struct/png_info pair causes the setter to read from freed memory and copy its contents into the replacement buffer. The setter frees the internal buffer before copying from the caller-supplied pointer, which now dangles. The freed region may contain stale data (producing silently corrupted chunk metadata) or data from subsequent heap allocations (leaking unrelated heap contents into the chunk struct). This vulnerability is fixed in 1.6.57.",
          "title": "Vulnerability description"
        }
      ],
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          "summary": "https://lists.debian.org/debian-lts-announce/2026/05/msg00017.html",
          "url": "https://lists.debian.org/debian-lts-announce/2026/05/msg00017.html"
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}