{"id":"CVE-2026-56297","aliases":["GHSA-3mv2-5q57-2v8h"],"url":"https://o3.security/vulnerability/CVE-2026-56297","summary":"FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback","details":"FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service.","published":"2026-07-08T13:49:01.343Z","modified":"2026-08-12T10:57:09.279713817Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56297.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56297"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/freerdp-use-after-free-via-race-condition-in-drdynvc-channel-callback"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T10:57:09.279713817Z"}}