CVE-2026-44422

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's RDPEAR NDR parser accepts one non-null NDR pointer ref-id for multiple logical pointer fields without tracking the pointed object's expected NDR type or ownership. When the same ref-id is reused across two pointer fields, the parser assigns the same heap object to both output fields. The generic destructor later walks each field independently and destroys/frees both pointers. This causes a malicious-server-triggerable heap use-after-free / double-free in the FreeRDP client's RDPEAR authentication-redirection path. This vulnerability is fixed in 3.26.0.

• CWE-415
• CWE-416
• CWE-825

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-j9q5-7g8m-jc9vExploit, Mitigation, Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:36203
• https://access.redhat.com/errata/RHSA-2026:46393
• https://access.redhat.com/security/cve/CVE-2026-44422
• https://bugzilla.redhat.com/show_bug.cgi?id=2483467
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-j9q5-7g8m-jc9vExploit, Mitigation, Vendor Advisory
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44422.json

Published

May 29, 2026

Last Modified

Jul 27, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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