CVE-2026-56297
Use-after-free in FreeRDP client enabling RCE or DoS via malicious RDP server.
Is CVE-2026-56297 being exploited?
Not confirmed. CVE-2026-56297 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-56297?
CVE-2026-56297 is rated High with a CVSS score of 8.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-56297?
Yes. A fix has been recorded for CVE-2026-56297. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-56297 affect?
CVE-2026-56297 affects FreeRDP < 3.22.0, Applications embedding FreeRDP (RDP clients), Clients using drdynvc dynamic virtual channels. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-56297?
Upgrade FreeRDP to 3.22.0+; restrict/block untrusted RDP servers.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution or denial of service against FreeRDP clients via a race on DYNVC_DATA/DYNVC_CLOSE causing heap-use-after-free.
Immediate action required
- affected< 3.22.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.