{ "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/2025/cve-2025-31498-els_os-centos6els.json" } ], "tracking": { "current_release_date": "2026-10-27T07:39:47Z", "generator": { "date": "2026-10-27T07:39:47Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2025-31498-ELS_OS-CENTOS6ELS", "initial_release_date": "2025-04-08T14:15:00Z", "revision_history": [ { "date": "2025-04-08T14:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-10-27T07:39:47Z", "number": "2", "summary": "Official Publication" } ], "status": "final", "version": "2" }, "title": "Security update on CVE-2025-31498" }, "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": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "product": { "name": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "product_id": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/c-ares-devel@1.10.0-3.el6.tuxcare.els1?arch=i686" } } }, { "category": "product_version", "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "product": { "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "product_id": "c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/c-ares@1.10.0-3.el6.tuxcare.els1?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product": { "name": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product_id": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/c-ares-devel@1.10.0-3.el6.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product": { "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product_id": "c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/cloudlinux/c-ares@1.10.0-3.el6.tuxcare.els1?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "CloudLinux" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686" }, "product_reference": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64" }, "product_reference": "c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64" }, "product_reference": "c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-6" }, { "category": "default_component_of", "full_product_name": { "name": "c-ares-0:1.10.0-3.el6.tuxcare.els1.i686 as a component of Community Enterprise Operating System 6", "product_id": "CentOS-6:c-ares-0:1.10.0-3.el6.tuxcare.els1.i686" }, "product_reference": "c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-6" } ] }, "vulnerabilities": [ { "cve": "CVE-2025-31498", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "description", "text": "c-ares is an asynchronous resolver library. From 1.32.3 through 1.34.4, there is a use-after-free in read_answers() when process_answer() may re-enqueue a query either due to a DNS Cookie Failure or when the upstream server does not properly support EDNS, or possibly on TCP queries if the remote closed the connection immediately after a response. If there was an issue trying to put that new transaction on the wire, it would close the connection handle, but read_answers() was still expecting the connection handle to be available to possibly dequeue other responses. In theory a remote attacker might be able to trigger this by flooding the target with ICMP UNREACHABLE packets if they also control the upstream nameserver and can return a result with one of those conditions, this has been untested. Otherwise only a local attacker might be able to change system behavior to make send()/write() return a failure condition. This vulnerability is fixed in 1.34.5.", "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:c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "CentOS-6:c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2025-31498" }, { "category": "external", "summary": "https://github.com/c-ares/c-ares/commit/29d38719112639d8c0ba910254a3dd4f482ea2d1", "url": "https://github.com/c-ares/c-ares/commit/29d38719112639d8c0ba910254a3dd4f482ea2d1" }, { "category": "external", "summary": "https://github.com/c-ares/c-ares/pull/821", "url": "https://github.com/c-ares/c-ares/pull/821" }, { "category": "external", "summary": "https://github.com/c-ares/c-ares/security/advisories/GHSA-6hxc-62jh-p29v", "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-6hxc-62jh-p29v" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2025/04/08/3", "url": "http://www.openwall.com/lists/oss-security/2025/04/08/3" } ], "release_date": "2025-04-08T14:15:00Z", "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-10-15T12:50:37.306502Z", "details": "important", "product_ids": [ "CentOS-6:c-ares-0:1.10.0-3.el6.tuxcare.els1.i686", "CentOS-6:c-ares-0:1.10.0-3.el6.tuxcare.els1.x86_64", "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.i686", "CentOS-6:c-ares-devel-0:1.10.0-3.el6.tuxcare.els1.x86_64" ] } ] } ] }