{"id":"UBUNTU-CVE-2026-44978","details":"xrdp is an open source RDP server. Versions 0.10.6 and prior contain a heap out-of-bounds read vulnerability within the FIPS-specific receive paths. This vulnerability does not affect the default configuration of xrdp. The vulnerability is only exploitable when the security layer is set to security_layer=negotiate or security_layer=rdp, and the crypto level is changed to crypt_level=fips in xrdp.ini. In this specific non-default mode, the server fails to validate the FIPS padding length field, leading to a pointer underflow and a subsequent negative length calculation. An unauthenticated remote attacker can exploit this by sending a crafted FIPS-protected PDU, causing a heap out-of-bounds read that results in a process crash and denial of service (DoS). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. This issue has been fixed in version 0.10.6.1.","modified":"2026-07-29T10:18:11.814713150Z","published":"2026-07-20T17:17:00Z","upstream":["CVE-2026-44978"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44978"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44978"},{"type":"REPORT","url":"https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-9cg5-f7m7-ppvj"}],"affected":[{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-1","0.6.0-1ubuntu0.1","0.6.0-1ubuntu0.1+esm1","0.6.0-1ubuntu0.1+esm2","0.6.0-1ubuntu0.1+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"xrdp","binary_version":"0.6.0-1ubuntu0.1+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1-2","0.6.1-2ubuntu0.1","0.6.1-2ubuntu0.3","0.6.1-2ubuntu0.3+esm1","0.6.1-2ubuntu0.3+esm2","0.6.1-2ubuntu0.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"xrdp","binary_version":"0.6.1-2ubuntu0.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.1-9","0.9.4-1","0.9.4-2","0.9.4-3","0.9.4-4","0.9.4-5","0.9.5-1","0.9.5-1build1","0.9.5-2","0.9.5-2ubuntu0.1~esm1","0.9.5-2ubuntu0.1~esm2","0.9.5-2ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"xorgxrdp","binary_version":"0.9.5-2ubuntu0.1~esm3"},{"binary_name":"xrdp","binary_version":"0.9.5-2ubuntu0.1~esm3"},{"binary_name":"xrdp-pulseaudio-installer","binary_version":"0.9.5-2ubuntu0.1~esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.9-1","0.9.12-1","0.9.12-1ubuntu0.1","0.9.12-1ubuntu0.1+esm1","0.9.12-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.12-1ubuntu0.1+esm2","binary_name":"xrdp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.15-1ubuntu1","0.9.17-1","0.9.17-2","0.9.17-2ubuntu1","0.9.17-2ubuntu2","0.9.17-2ubuntu2+esm1","0.9.17-2ubuntu3","0.9.17-2ubuntu3+esm1","0.9.17-2ubuntu3+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.17-2ubuntu3+esm2","binary_name":"xrdp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.21.1-1","0.9.24-2","0.9.24-3","0.9.24-3build1","0.9.24-3build2","0.9.24-4","0.9.24-4ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"xrdp","binary_version":"0.9.24-4ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.1-3","0.10.1-3.1","0.10.1-3.1+deb13u1build0.25.10.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.10.1-3.1+deb13u1build0.25.10.1","binary_name":"xrdp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.json"}},{"package":{"name":"xrdp","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/xrdp?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.1-3.1","0.10.1-4","0.10.1-4.1"],"ecosystem_specific":{"binaries":[{"binary_name":"xrdp","binary_version":"0.10.1-4.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44978.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:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}