{ "document": { "aggregate_severity": { "text": "High" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "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" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos6els/vex/2026/cve-2026-33636-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-10-26T14:54:15Z", "generator": { "date": "2026-10-26T14:54:15Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-33636-ELS_OS-CENTOS6ELS", "initial_release_date": "2026-03-26T17:16:00Z", "revision_history": [ { "date": "2026-03-26T17:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-10-26T14:54:15Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2026-33636" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 6", "product": { "name": "Community Enterprise Operating System 6", "product_id": "CentOS-6", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:6:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product": { "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_id": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng-devel@1.2.49-2.el6_7.tuxcare.els1?arch=i686&epoch=2" } } }, { "category": "product_version", "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product": { "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_id": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng-static@1.2.49-2.el6_7.tuxcare.els1?arch=i686&epoch=2" } } }, { "category": "product_version", "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product": { "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_id": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng@1.2.49-2.el6_7.tuxcare.els1?arch=i686&epoch=2" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product": { "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_id": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng-devel@1.2.49-2.el6_7.tuxcare.els1?arch=x86_64&epoch=2" } } }, { "category": "product_version", "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product": { "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_id": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng-static@1.2.49-2.el6_7.tuxcare.els1?arch=x86_64&epoch=2" } } }, { "category": "product_version", "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product": { "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_id": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/libpng@1.2.49-2.el6_7.tuxcare.els1?arch=x86_64&epoch=2" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686" }, "product_reference": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64" }, "product_reference": "libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64" }, "product_reference": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686" }, "product_reference": "libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64" }, "product_reference": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686" }, "product_reference": "libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33636", "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. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels remain. Because the implementation works backward from the end of the row, the final iteration dereferences pointers before the start of the row buffer (OOB read) and writes expanded pixel data to the same underflowed positions (OOB write). This is reachable via normal decoding of attacker-controlled PNG input if Neon is enabled. Version 1.6.56 fixes the issue.", "title": "Vulnerability description" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-33636" }, { "category": "external", "summary": "https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869", "url": "https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869" }, { "category": "external", "summary": "https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3", "url": "https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3" }, { "category": "external", "summary": "https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2", "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2" } ], "release_date": "2026-03-26T17:16:00Z", "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-10-22T03:03:31.443580Z", "details": "important", "product_ids": [ "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-devel-2:1.2.49-2.el6_7.tuxcare.els1.x86_64", "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.i686", "CentOS-6:libpng-static-2:1.2.49-2.el6_7.tuxcare.els1.x86_64" ] } ] } ] }