{"id":"UBUNTU-CVE-2021-3861","details":"The RNDIS USB device class includes a buffer overflow vulnerability. Zephyr versions \u003e= v2.6.0 contain Heap-based Buffer Overflow (CWE-122). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj","modified":"2026-05-20T16:05:10.411363992Z","published":"2022-02-07T22:15:00Z","upstream":["CVE-2021-3861"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3861"},{"type":"REPORT","url":"http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-hvfp-w4h8-gxvj"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-3861"}],"affected":[{"package":{"name":"zephyr","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1","3.1.2-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.2-1build1","binary_name":"libzephyr4"},{"binary_name":"libzephyr4-krb5","binary_version":"3.1.2-1build1"},{"binary_name":"zephyr-clients","binary_version":"3.1.2-1build1"},{"binary_name":"zephyr-server","binary_version":"3.1.2-1build1"},{"binary_name":"zephyr-server-krb5","binary_version":"3.1.2-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build1","3.1.2-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libzephyr4","binary_version":"3.1.2-1build2"},{"binary_name":"libzephyr4-krb5","binary_version":"3.1.2-1build2"},{"binary_version":"3.1.2-1build2","binary_name":"zephyr-clients"},{"binary_version":"3.1.2-1build2","binary_name":"zephyr-server"},{"binary_name":"zephyr-server-krb5","binary_version":"3.1.2-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"libzephyr4","binary_version":"3.1.2-1build3"},{"binary_version":"3.1.2-1build3","binary_name":"libzephyr4-krb5"},{"binary_name":"zephyr-clients","binary_version":"3.1.2-1build3"},{"binary_name":"zephyr-server","binary_version":"3.1.2-1build3"},{"binary_name":"zephyr-server-krb5","binary_version":"3.1.2-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"libzephyr4","binary_version":"3.1.2-1build3"},{"binary_name":"libzephyr4-krb5","binary_version":"3.1.2-1build3"},{"binary_name":"zephyr-clients","binary_version":"3.1.2-1build3"},{"binary_name":"zephyr-server","binary_version":"3.1.2-1build3"},{"binary_name":"zephyr-server-krb5","binary_version":"3.1.2-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1","3.1.2-1.1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.2-1.1build1","binary_name":"libzephyr4"},{"binary_version":"3.1.2-1.1build1","binary_name":"libzephyr4-krb5"},{"binary_name":"zephyr-clients","binary_version":"3.1.2-1.1build1"},{"binary_name":"zephyr-server","binary_version":"3.1.2-1.1build1"},{"binary_version":"3.1.2-1.1build1","binary_name":"zephyr-server-krb5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1.2-1.1build1","binary_name":"libzephyr4"},{"binary_name":"libzephyr4-krb5","binary_version":"3.1.2-1.1build1"},{"binary_version":"3.1.2-1.1build1","binary_name":"zephyr-clients"},{"binary_version":"3.1.2-1.1build1","binary_name":"zephyr-server"},{"binary_name":"zephyr-server-krb5","binary_version":"3.1.2-1.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-3861.json"}},{"package":{"name":"zephyr","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/zephyr?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.2-1.1build1",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