{"id":"UBUNTU-CVE-2025-59391","details":"A memory disclosure vulnerability exists in libcoap's OSCORE configuration parser in libcoap before release-4.3.5-patches. An out-of-bounds read may occur when parsing certain configuration values, allowing an attacker to infer or read memory beyond string boundaries in the .rodata section. This could potentially lead to information disclosure or denial of service.","modified":"2026-05-20T16:23:37.985933634Z","published":"2025-12-08T17:16:00Z","upstream":["CVE-2025-59391"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-59391"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-59391"},{"type":"REPORT","url":"https://github.com/obgm/libcoap/pull/1730"},{"type":"REPORT","url":"https://github.com/obgm/libcoap/releases/tag/v4.3.5a"}],"affected":[{"package":{"name":"libcoap","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libcoap?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.1.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap-1-0","binary_version":"4.1.2-1"},{"binary_version":"4.1.2-1","binary_name":"libcoap-1-0-bin"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libcoap2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.0-2","4.2.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap2","binary_version":"4.2.1-1"},{"binary_version":"4.2.1-1","binary_name":"libcoap2-bin"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libcoap2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1-1","4.2.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap2","binary_version":"4.2.1-1build1"},{"binary_name":"libcoap2-bin","binary_version":"4.2.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap3","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libcoap3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.0-2","4.3.0-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap3","binary_version":"4.3.0-2build1"},{"binary_name":"libcoap3-bin","binary_version":"4.3.0-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap3","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libcoap3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-2","4.3.3-1","4.3.4-1","4.3.4-1.1build2","4.3.4-1.1build3","4.3.4-1.1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap3-bin","binary_version":"4.3.4-1.1build4"},{"binary_name":"libcoap3t64","binary_version":"4.3.4-1.1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap3","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libcoap3?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1.1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libcoap3-bin","binary_version":"4.3.4-1.1build4"},{"binary_version":"4.3.4-1.1build4","binary_name":"libcoap3t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.json"}},{"package":{"name":"libcoap3","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libcoap3?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1.1build4","4.3.5-1","4.3.5-2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.5-2","binary_name":"libcoap3-bin"},{"binary_version":"4.3.5-2","binary_name":"libcoap3t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-59391.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:L/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}