Bug 2442783 (CVE-2026-27951)

Summary: CVE-2026-27951 freerdp: FreeRDP: Denial of Service via endless blocking loop in Stream_EnsureCapacity
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 flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. The `Stream_EnsureCapacity` function can create an endless blocking loop, leading to a Denial of Service (DoS). This vulnerability can be exploited on 32-bit systems where the available physical memory is greater than or equal to the `SIZE_MAX` variable, potentially affecting both client and server implementations using FreeRDP.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2442800, 2442803, 2442810, 2442801, 2442806    
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Description OSIDB Bzimport 2026-02-25 22:02:16 UTC
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.