{"id":"UBUNTU-CVE-2021-41036","details":"In versions prior to 1.1 of the Eclipse Paho MQTT C Client, the client does not check rem_len size in readpacket.","modified":"2026-05-20T16:05:08.623822294Z","published":"2021-11-03T00:15:00Z","upstream":["CVE-2021-41036"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-41036"},{"type":"REPORT","url":"https://github.com/eclipse/paho.mqtt.embedded-c/issues/96"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-41036"}],"affected":[{"package":{"name":"paho.mqtt.c","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/paho.mqtt.c?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.9-1","1.3.9-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpaho-mqtt1.3","binary_version":"1.3.9-1build1"},{"binary_name":"paho.mqtt.c-examples","binary_version":"1.3.9-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-41036.json"}},{"package":{"name":"paho.mqtt.c","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/paho.mqtt.c?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.12-1","1.3.13-1","1.3.13-1build1","1.3.13-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libpaho-mqtt1.3","binary_version":"1.3.13-1build2"},{"binary_version":"1.3.13-1build2","binary_name":"paho.mqtt.c-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-41036.json"}},{"package":{"name":"paho.mqtt.c","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/paho.mqtt.c?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.14-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.14-2","binary_name":"libpaho-mqtt1.3"},{"binary_version":"1.3.14-2","binary_name":"paho.mqtt.c-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-41036.json"}},{"package":{"name":"paho.mqtt.c","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/paho.mqtt.c?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.14-2","1.3.15-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.15-1","binary_name":"libpaho-mqtt1.3"},{"binary_name":"paho.mqtt.c-examples","binary_version":"1.3.15-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-41036.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}