{"id":"UBUNTU-CVE-2026-75883","details":"The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf  without checking the available space and without implementing outgoing PEAP fragmentation. Thus a pppd process connecting to a server which requests PEAP authentication can be induced to corrupt global static data following the outpacket_buf array, most likely causing incorrect behavior or a crash.","modified":"2026-09-24T02:01:43.872298950Z","published":"2026-09-18T16:17:00Z","upstream":["CVE-2026-75883"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-75883"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-75883"}],"affected":[{"package":{"name":"network-manager-l2tp","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.8-1","1.2.8-2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.8-2build1","binary_name":"network-manager-l2tp"},{"binary_name":"network-manager-l2tp-gnome","binary_version":"1.2.8-2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"}},{"package":{"name":"network-manager-l2tp","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.10-1","1.2.14-1","1.2.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"network-manager-l2tp","binary_version":"1.2.16-1"},{"binary_name":"network-manager-l2tp-gnome","binary_version":"1.2.16-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"}},{"package":{"name":"network-manager-l2tp","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.18-1build1","1.20.0-1","1.20.0-1build1","1.20.0-1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.20.0-1build2","binary_name":"network-manager-l2tp"},{"binary_version":"1.20.0-1build2","binary_name":"network-manager-l2tp-gnome"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"}},{"package":{"name":"network-manager-l2tp","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.8-1","1.20.10-1","1.20.12-1","1.20.12-1build1","1.20.12-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"network-manager-l2tp","binary_version":"1.20.12-1build2"},{"binary_name":"network-manager-l2tp-gnome","binary_version":"1.20.12-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"}},{"package":{"name":"network-manager-l2tp","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/network-manager-l2tp?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.20-2","1.52.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"network-manager-l2tp","binary_version":"1.52.0-2"},{"binary_version":"1.52.0-2","binary_name":"network-manager-l2tp-gnome"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-75883.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}