{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for libpng12 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "The libpng12 package provides libpng 1.2, which is the previous version of the libpng library for manipulating PNG (Portable Network Graphics) image format files. This version should be used in case that it is not possible to use the current version of libpng.\n\nSecurity Fix(es):\n\n* libpng: LIBPNG has a heap buffer overflow in png_set_quantize (CVE-2026-25646)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "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 Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2026:7032", "url": "https://access.redhat.com/errata/RHSA-2026:7032" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2438542", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2438542" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_7032.json" } ], "title": "Red Hat Security Advisory: libpng12 security update", "tracking": { "current_release_date": "2026-05-20T22:00:59+00:00", "generator": { "date": "2026-05-20T22:00:59+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.8.0" } }, "id": "RHSA-2026:7032", "initial_release_date": "2026-04-08T12:15:17+00:00", "revision_history": [ { "date": "2026-04-08T12:15:17+00:00", "number": "1", "summary": "Initial version" }, { "date": "2026-04-08T12:15:17+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-05-20T22:00:59+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux Server (v. 7 ELS)", "product": { "name": "Red Hat Enterprise Linux Server (v. 7 ELS)", "product_id": 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"7Server-optional-ELS:libpng12-debuginfo-0:1.2.50-10.el7_9.1.x86_64", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.i686", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.ppc", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.ppc64", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.ppc64le", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.s390", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.s390x", "7Server-optional-ELS:libpng12-devel-0:1.2.50-10.el7_9.1.x86_64" ] } ], "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2438542" } ], "notes": [ { "category": "description", "text": "A heap based buffer overflow flaw has been discovered in LibPNG. Prior to version 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification.", "title": "Vulnerability description" }, { "category": "summary", "text": "libpng: LIBPNG has a heap buffer overflow in png_set_quantize", "title": "Vulnerability summary" }, { "category": "other", "text": "For `java-17-openjdk-headless` and `java-21-openjdk-headless`, while the affected code is present in the bundled sources, it is not exercised by these headless packages.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Server-ELS:libpng12-0:1.2.50-10.el7_9.1.i686", "7Server-ELS:libpng12-0:1.2.50-10.el7_9.1.ppc", "7Server-ELS:libpng12-0:1.2.50-10.el7_9.1.ppc64", "7Server-ELS:libpng12-0:1.2.50-10.el7_9.1.ppc64le", 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"Important" } ], "title": "libpng: LIBPNG has a heap buffer overflow in png_set_quantize" } ] }