{"id":"USN-8598-1","summary":"rsyslog vulnerabilities","details":"It was discovered that rsyslog incorrectly handled regex-based TCP framing\nin the imptcp module. A remote attacker could possibly use this issue to\ncause rsyslog to crash, resulting in a denial of service.\n\nIt was discovered that rsyslog incorrectly handled oversized RFC5424\nstructured data in the mmpstrucdata module. A remote attacker could\npossibly use this issue to cause rsyslog to crash, resulting in a denial of\nservice. (CVE-2026-61548)","modified":"2026-09-21T10:00:32.382602316Z","published":"2026-07-23T14:26:13Z","related":["UBUNTU-CVE-2026-19654","UBUNTU-CVE-2026-61548"],"upstream":["CVE-2026-61548","UBUNTU-CVE-2026-61548"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8598-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-61548"}],"affected":[{"package":{"name":"rsyslog","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/rsyslog?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.2112.0-2ubuntu2.4"}]}],"versions":["8.2102.0-2ubuntu2","8.2110.0-3ubuntu1","8.2110.0-3ubuntu2","8.2110.0-4ubuntu1","8.2112.0-2ubuntu2","8.2112.0-2ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_name":"rsyslog","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_name":"rsyslog-czmq","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-elasticsearch"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-gnutls"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-gssapi"},{"binary_name":"rsyslog-hiredis","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-kafka"},{"binary_name":"rsyslog-kubernetes","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_name":"rsyslog-mongodb","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-mysql"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-openssl"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-pgsql"},{"binary_name":"rsyslog-relp","binary_version":"8.2112.0-2ubuntu2.4"},{"binary_version":"8.2112.0-2ubuntu2.4","binary_name":"rsyslog-snmp"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-61548"}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json"}},{"package":{"name":"rsyslog","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rsyslog?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.2312.0-3ubuntu9.3"}]}],"versions":["8.2306.0-2ubuntu2","8.2312.0-3ubuntu1","8.2312.0-3ubuntu2","8.2312.0-3ubuntu3","8.2312.0-3ubuntu7","8.2312.0-3ubuntu8","8.2312.0-3ubuntu9","8.2312.0-3ubuntu9.1","8.2312.0-3ubuntu9.2"],"ecosystem_specific":{"binaries":[{"binary_name":"rsyslog","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_version":"8.2312.0-3ubuntu9.3","binary_name":"rsyslog-czmq"},{"binary_version":"8.2312.0-3ubuntu9.3","binary_name":"rsyslog-elasticsearch"},{"binary_name":"rsyslog-gnutls","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-gssapi","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-hiredis","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-kafka","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-kubernetes","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_version":"8.2312.0-3ubuntu9.3","binary_name":"rsyslog-mongodb"},{"binary_name":"rsyslog-mysql","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-openssl","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_name":"rsyslog-pgsql","binary_version":"8.2312.0-3ubuntu9.3"},{"binary_version":"8.2312.0-3ubuntu9.3","binary_name":"rsyslog-relp"},{"binary_version":"8.2312.0-3ubuntu9.3","binary_name":"rsyslog-snmp"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json","cves_map":{"cves":[{"id":"CVE-2026-61548","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"rsyslog","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rsyslog?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.2512.0-1ubuntu4.1"}]}],"versions":["8.2504.0-1ubuntu2","8.2512.0-1ubuntu2","8.2512.0-1ubuntu3","8.2512.0-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"rsyslog","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-clickhouse","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_version":"8.2512.0-1ubuntu4.1","binary_name":"rsyslog-czmq"},{"binary_name":"rsyslog-docker","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-elasticsearch","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-gnutls","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_version":"8.2512.0-1ubuntu4.1","binary_name":"rsyslog-gssapi"},{"binary_name":"rsyslog-hiredis","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-kafka","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-kubernetes","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-mongodb","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_version":"8.2512.0-1ubuntu4.1","binary_name":"rsyslog-mysql"},{"binary_version":"8.2512.0-1ubuntu4.1","binary_name":"rsyslog-openssl"},{"binary_name":"rsyslog-pgsql","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-relp","binary_version":"8.2512.0-1ubuntu4.1"},{"binary_name":"rsyslog-snmp","binary_version":"8.2512.0-1ubuntu4.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-61548"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8598-1.json"}}],"schema_version":"1.9.0"}