{"id":"USN-8004-2","summary":"freerdp2 regression","details":"USN-8004-1 fixed vulnerabilities in FreeRDP. The update for\nCVE-2026-23533 introduced a regression. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\nKim Dong Han discovered that FreeRDP did not correctly validate the size of\ncertain variables, which could cause a buffer overflow. An attacker could\npossibly use this issue to cause a denial of service or execute arbitrary\ncode.","modified":"2026-09-11T15:00:18.002327370Z","published":"2026-02-08T22:38:37Z","related":["UBUNTU-CVE-2026-23533"],"upstream":["CVE-2026-23533","UBUNTU-CVE-2026-23533"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8004-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23533"},{"type":"REPORT","url":"https://bugs.launchpad.net/bugs/2139694"}],"affected":[{"package":{"name":"freerdp2","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"}]}],"versions":["2.0.0~git20170725.1.1648deb+dfsg1-1","2.0.0~git20170725.1.1648deb+dfsg1-5","2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1","2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2","2.0.0~git20170725.1.1648deb+dfsg1-6","2.0.0~git20170725.1.1648deb+dfsg1-6build1","2.0.0~git20170725.1.1648deb+dfsg1-7","2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1","2.1.1+dfsg1-0ubuntu0.18.04.1","2.2.0+dfsg1-0ubuntu0.18.04.1","2.2.0+dfsg1-0ubuntu0.18.04.2","2.2.0+dfsg1-0ubuntu0.18.04.3","2.2.0+dfsg1-0ubuntu0.18.04.4","2.2.0+dfsg1-0ubuntu0.18.04.4+esm1","2.2.0+dfsg1-0ubuntu0.18.04.4+esm2","2.2.0+dfsg1-0ubuntu0.18.04.4+esm3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"freerdp2-shadow-x11","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_name":"freerdp2-wayland","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_name":"freerdp2-x11","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_name":"libfreerdp-client2-2","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_name":"libfreerdp-server2-2","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_name":"libfreerdp-shadow-subsystem2-2","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4","binary_name":"libfreerdp-shadow2-2"},{"binary_name":"libfreerdp2-2","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4","binary_name":"libuwac0-0"},{"binary_name":"libwinpr-tools2-2","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"},{"binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4","binary_name":"libwinpr2-2"},{"binary_name":"winpr-utils","binary_version":"2.2.0+dfsg1-0ubuntu0.18.04.4+esm4"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-23533","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8004-2.json"}},{"package":{"name":"freerdp2","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"}]}],"versions":["2.0.0~git20190204.1.2693389a+dfsg1-1","2.0.0~git20190204.1.2693389a+dfsg1-2","2.0.0~git20190204.1.2693389a+dfsg1-2build1","2.0.0~git20190204.1.2693389a+dfsg1-2build2","2.1.1+dfsg1-0ubuntu0.20.04.1","2.2.0+dfsg1-0ubuntu0.20.04.1","2.2.0+dfsg1-0ubuntu0.20.04.2","2.2.0+dfsg1-0ubuntu0.20.04.3","2.2.0+dfsg1-0ubuntu0.20.04.4","2.2.0+dfsg1-0ubuntu0.20.04.5","2.2.0+dfsg1-0ubuntu0.20.04.6","2.6.1+dfsg1-0ubuntu0.20.04.1","2.6.1+dfsg1-0ubuntu0.20.04.2","2.6.1+dfsg1-0ubuntu0.20.04.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2","binary_name":"freerdp2-shadow-x11"},{"binary_name":"freerdp2-wayland","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2","binary_name":"freerdp2-x11"},{"binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2","binary_name":"libfreerdp-client2-2"},{"binary_name":"libfreerdp-server2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libfreerdp-shadow-subsystem2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libfreerdp-shadow2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libfreerdp2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libuwac0-0","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libwinpr-tools2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"libwinpr2-2","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"},{"binary_name":"winpr-utils","binary_version":"2.6.1+dfsg1-0ubuntu0.20.04.2+esm2"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-23533","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8004-2.json"}},{"package":{"name":"freerdp2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/freerdp2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1+dfsg1-3ubuntu2.9"}]}],"versions":["2.3.0+dfsg1-2build1","2.3.0+dfsg1-2ubuntu1","2.3.0+dfsg1-2ubuntu2","2.4.1+dfsg1-1","2.4.1+dfsg1-1ubuntu1","2.4.1+dfsg1-1ubuntu2","2.5.0+dfsg1-1","2.6.0+dfsg1-1","2.6.1+dfsg1-1","2.6.1+dfsg1-3","2.6.1+dfsg1-3ubuntu1","2.6.1+dfsg1-3ubuntu2","2.6.1+dfsg1-3ubuntu2.1","2.6.1+dfsg1-3ubuntu2.2","2.6.1+dfsg1-3ubuntu2.3","2.6.1+dfsg1-3ubuntu2.4","2.6.1+dfsg1-3ubuntu2.5","2.6.1+dfsg1-3ubuntu2.6","2.6.1+dfsg1-3ubuntu2.7","2.6.1+dfsg1-3ubuntu2.8"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"freerdp2-shadow-x11"},{"binary_name":"freerdp2-wayland","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"freerdp2-x11"},{"binary_name":"libfreerdp-client2-2","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_name":"libfreerdp-server2-2","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"libfreerdp-shadow-subsystem2-2"},{"binary_name":"libfreerdp-shadow2-2","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_name":"libfreerdp2-2","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"libuwac0-0"},{"binary_name":"libwinpr-tools2-2","binary_version":"2.6.1+dfsg1-3ubuntu2.9"},{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"libwinpr2-2"},{"binary_version":"2.6.1+dfsg1-3ubuntu2.9","binary_name":"winpr-utils"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-23533","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"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"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8004-2.json"}},{"package":{"name":"freerdp2","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.5+dfsg1-1ubuntu0.1~esm4"}]}],"versions":["2.10.0+dfsg1-1.1ubuntu1","2.11.2+dfsg1-1","2.11.2+dfsg1-1build1","2.11.2+dfsg1-1build3","2.11.5+dfsg1-1build1","2.11.5+dfsg1-1build2","2.11.5+dfsg1-1ubuntu0.1~esm1","2.11.5+dfsg1-1ubuntu0.1~esm2","2.11.5+dfsg1-1ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"freerdp2-shadow-x11"},{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"freerdp2-wayland"},{"binary_name":"freerdp2-x11","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"},{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"libfreerdp-client2-2t64"},{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"libfreerdp-server2-2t64"},{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"libfreerdp-shadow-subsystem2-2t64"},{"binary_name":"libfreerdp-shadow2-2t64","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"},{"binary_name":"libfreerdp2-2t64","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"},{"binary_name":"libuwac0-0t64","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"},{"binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4","binary_name":"libwinpr-tools2-2t64"},{"binary_name":"libwinpr2-2t64","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"},{"binary_name":"winpr-utils","binary_version":"2.11.5+dfsg1-1ubuntu0.1~esm4"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8004-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:24.04:LTS","cves":[{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-23533"}]}}}],"schema_version":"1.9.0"}