Bug 2554616 (CVE-2026-111881)

Summary: CVE-2026-111881 freerdp: freerdp: Denial of Service via crafted clipboard bitmap image
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FreeRDP. An integer underflow vulnerability exists in its bitmap image processing component due to an incorrect calculation when handling sub-byte images. A remote attacker acting as a malicious peer in a Remote Desktop Protocol (RDP) session can exploit this by supplying a specially crafted bitmap image through clipboard data exchange. This flaw can cause the client application to crash, leading to a Denial of Service (DoS), or potentially result in an out-of-bounds memory write.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-10-17 19:02:01 UTC
FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.