{"document":{"aggregate_severity":{"namespace":"https://www.suse.com/support/security/rating/","text":"moderate"},"category":"csaf_vex","csaf_version":"2.0","distribution":{"text":"Copyright 2024 SUSE LLC. All rights reserved.","tlp":{"label":"WHITE","url":"https://www.first.org/tlp/"}},"lang":"en","notes":[{"category":"summary","text":"SUSE CVE-2025-61672","title":"Title"},{"category":"description","text":"Synapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this reason, the maintainers of Synapse recommend skipping these releases and upgrading straight to 1.138.4 and 1.139.2.","title":"Description of the CVE"},{"category":"legal_disclaimer","text":"CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).","title":"Terms of use"}],"publisher":{"category":"vendor","contact_details":"https://www.suse.com/support/security/contact/","name":"SUSE Product Security Team","namespace":"https://www.suse.com/"},"references":[{"category":"external","summary":"CVE-2025-61672","url":"https://www.suse.com/security/cve/CVE-2025-61672"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1251231 for CVE-2025-61672","url":"https://bugzilla.suse.com/1251231"}],"title":"SUSE CVE CVE-2025-61672","tracking":{"current_release_date":"2025-10-08T23:22:24Z","generator":{"date":"2025-10-07T23:25:27Z","engine":{"name":"cve-database.git:bin/generate-csaf-vex.pl","version":"1"}},"id":"CVE-2025-61672","initial_release_date":"2025-10-07T23:25:27Z","revision_history":[{"date":"2025-10-07T23:25:27Z","number":"2","summary":"Current version"},{"date":"2025-10-08T23:22:24Z","number":"3","summary":"Current version"}],"status":"interim","version":"3"}},"product_tree":{"branches":[{"branches":[{"branches":[{"category":"product_name","name":"openSUSE Tumbleweed","product":{"name":"openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed","product_identification_helper":{"cpe":"cpe:/o:opensuse:tumbleweed"}}},{"category":"product_version","name":"matrix-synapse-1.139.1-1.1","product":{"name":"matrix-synapse-1.139.1-1.1","product_id":"matrix-synapse-1.139.1-1.1","product_identification_helper":{"cpe":"cpe:2.3:a:matrix:synapse:1.139.1:*:*:*:*:*:*:*","purl":"pkg:rpm/suse/matrix-synapse@1.139.1-1.1"}}}],"category":"product_family","name":"SUSE Linux Enterprise"}],"category":"vendor","name":"SUSE"}],"relationships":[{"category":"default_component_of","full_product_name":{"name":"matrix-synapse-1.139.1-1.1 as component of openSUSE Tumbleweed","product_id":"openSUSE Tumbleweed:matrix-synapse-1.139.1-1.1"},"product_reference":"matrix-synapse-1.139.1-1.1","relates_to_product_reference":"openSUSE Tumbleweed"}]},"vulnerabilities":[{"cve":"CVE-2025-61672","ids":[{"system_name":"SUSE CVE Page","text":"https://www.suse.com/security/cve/CVE-2025-61672"}],"notes":[{"category":"general","text":"Synapse is an open source Matrix homeserver implementation. Lack of validation for device keys in Synapse before 1.138.3 and in Synapse 1.139.0 allow an attacker registered on the victim homeserver to degrade federation functionality, unpredictably breaking outbound federation to other homeservers. The issue is patched in Synapse 1.138.3, 1.138.4, 1.139.1, and 1.139.2. Note that even though 1.138.3 and 1.139.1 fix the vulnerability, they inadvertently introduced an unrelated regression. For this reason, the maintainers of Synapse recommend skipping these releases and upgrading straight to 1.138.4 and 1.139.2.","title":"CVE description"}],"product_status":{"recommended":["openSUSE Tumbleweed:matrix-synapse-1.139.1-1.1"]},"references":[{"category":"external","summary":"CVE-2025-61672","url":"https://www.suse.com/security/cve/CVE-2025-61672"},{"category":"external","summary":"SUSE Security Ratings","url":"https://www.suse.com/support/security/rating/"},{"category":"external","summary":"SUSE Bug 1251231 for CVE-2025-61672","url":"https://bugzilla.suse.com/1251231"}],"remediations":[{"category":"vendor_fix","details":"To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n","product_ids":["openSUSE Tumbleweed:matrix-synapse-1.139.1-1.1"]}],"threats":[{"category":"impact","date":"2025-10-07T13:15:08Z","details":"moderate"}],"title":"CVE-2025-61672"}]}