{"id":"CVE-2026-55238","summary":"xrdp: Malformed Confirm Active capability sets cause out-of-bounds reads","details":"xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). 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.","aliases":["GHSA-mg8j-x9rw-9xv3"],"modified":"2026-08-12T03:51:49.424954080Z","published":"2026-07-20T17:05:01.470Z","database_specific":{"cwe_ids":["CWE-126"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55238.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55238.json"},{"type":"ADVISORY","url":"https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-mg8j-x9rw-9xv3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55238"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/neutrinolabs/xrdp","events":[{"introduced":"0"},{"fixed":"80c52879fead585d6347df5b3c587718adf8f5a5"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.10.6.1"}]}}],"versions":["v0.10.6.1-rc.1","v0.10.6","v0.10.5","v0.10.4.1","v0.10.4","v0.10.3","v0.10.2","v0.10.2-rc.1","v0.10.1","v0.10.0","v0.10.0-beta.3","v0.10.0-beta.2","v0.10.0-beta.1","v0.9.18","v0.9.17","v0.9.16","v0.9.15","v0.9.14","v0.9.13","v0.9.12","v0.9.11","v0.9.10","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.4.rc1","v0.9.3","v0.9.3.rc1","v0.9.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55238.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}