RHSA-2026:13719

Vulnerability from csaf_redhat - Published: 2026-05-05 11:30 - Updated: 2026-05-05 11:43
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: libpng: * libpng-1.6.57-0.1.hum1 (aarch64, x86_64) * libpng-devel-1.6.57-0.1.hum1 (aarch64, x86_64) * libpng-static-1.6.57-0.1.hum1 (aarch64, x86_64) * libpng-tools-1.6.57-0.1.hum1 (aarch64, x86_64) * libpng-1.6.57-0.1.hum1.src (src) Security Fix(es): libpng: * CVE-2026-34757
Terms of Use: 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 Red Hat Inc. and provide a link to the original.
CVE-2026-34757

A flaw was found in libpng, a library used for handling PNG (Portable Network Graphics) image files. This vulnerability arises when an application reuses a pointer, previously obtained from functions like png_get_PLTE, by passing it back to a corresponding setter function within the same image structure. This action causes the setter to access memory that has already been deallocated, leading to a use-after-free condition. A local attacker could potentially exploit this flaw to corrupt image metadata or disclose sensitive information from the application's memory.

4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE-825 - Expired Pointer Dereference
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/ https://access.redhat.com/errata/RHSA-2026:13719
Workaround Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References
To clipboard 

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        "text": "This update includes the following RPMs:\n\nlibpng:\n  * libpng-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-devel-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-static-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-tools-1.6.57-0.1.hum1 (aarch64, x86_64)\n  * libpng-1.6.57-0.1.hum1.src (src)\n\nSecurity Fix(es):\n\nlibpng:\n  * CVE-2026-34757",
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      "discovery_date": "2026-04-09T15:02:17.900673+00:00",
      "ids": [
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          "text": "A flaw was found in libpng, a library used for handling PNG (Portable Network Graphics) image files. This vulnerability arises when an application reuses a pointer, previously obtained from functions like png_get_PLTE, by passing it back to a corresponding setter function within the same image structure. This action causes the setter to access memory that has already been deallocated, leading to a use-after-free condition. A local attacker could potentially exploit this flaw to corrupt image metadata or disclose sensitive information from the application\u0027s memory.",
          "title": "Vulnerability description"
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          "text": "libpng: libpng: Information disclosure and data corruption via use-after-free vulnerability",
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        },
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          "category": "other",
          "text": "There\u0027s a use-after-free vulnerability in libpng. The flaw occurs when an application reuses a pointer from `png_get_PLTE`, `png_get_tRNS`, or `png_get_hIST` and passes it to a corresponding setter, leading to memory corruption or information disclosure. A local attacker could exploit this if a vulnerable application processes PNG files in this specific manner.\nRed Hat Product Security team has rated this as having a moderate impact as the user needs to be tricked to open the maliciously crafted PNG image, additionally the attacker doesn\u0027t have full control if the content it\u0027s exfiltrating or corruption in the memory.",
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          "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-6fr7-g8h7-v645"
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      "release_date": "2026-04-09T14:41:18.195000+00:00",
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            "Red Hat Hardened Images:libpng-main@src",
            "Red Hat Hardened Images:libpng-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:libpng-main@aarch64",
            "Red Hat Hardened Images:libpng-main@src",
            "Red Hat Hardened Images:libpng-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "libpng: libpng: Information disclosure and data corruption via use-after-free vulnerability"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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