High [CVE-2026-91948] Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL
This high-severity Red Hat Linux advisory covers CVE-2026-91948; related products: Red Hat Enterprise Linux 10, Red Hat package: freerdp.
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Summary
Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL. Red Hat rates this important (CVSS 7.5).
Weakness: CWE-124.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat package: freerdp.
- < 3.31.0
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict network access to the FreeRDP server to only trusted clients or localhost. This can be achieved by configuring firewall rules to limit inbound connections to the FreeRDP service port. A restart of the FreeRDP server may be required for network configuration changes to take effect.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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