Bug 2429647 (CVE-2026-22853)

Summary: CVE-2026-22853 freerdp: FreeRDP heap-buffer-overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A heap based buffer overflow flaw has been discovered in FreeRDP. In affected versions RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2429790, 2429807, 2429817, 2429793, 2429812    
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Description OSIDB Bzimport 2026-01-14 18:01:29 UTC
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.