CVE-2026-44422

Summary

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.

Affected Software

Weaknesses

• CWE-416: CWE-416: Use After Free
• CWE-415: CWE-415: Double Free

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-j9q5-7g8m-jc9v

freerdp: FreeRDP: Arbitrary code execution or denial of service via heap use-after-free in RDPEAR NDR parser

Additional References

• https://access.redhat.com/security/cve/CVE-2026-44422
• https://bugzilla.redhat.com/show_bug.cgi?id=2483467
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44422.json

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-j9q5-7g8m-jc9v

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