Bug 2550524 (CVE-2026-109940)

Summary: CVE-2026-109940 freerdp: FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name
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: 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 attacker who supplies a malicious or compromised Public-Key Cryptography Standards (PKCS#11) token can cause a Denial of Service (DoS) by crashing the client application. During key enumeration, FreeRDP processes key identifier attributes into a fixed-size stack buffer without adequate bounds checking. Presenting a token with an oversized key identifier triggers a stack-based buffer overflow, causing the application to terminate unexpectedly.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2560936    
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Description OSIDB Bzimport 2026-10-13 13:54:41 UTC 
FreeRDP 3.0.0-beta1 before 3.32.0 on Unix builds with PKCS#11 support has a stack-based buffer overflow in wprintKeyName() in WinPR's NCrypt PKCS#11 provider. It hex-encodes a key's CKA_ID, which can be up to 64 bytes, into a fixed 128-byte stack buffer. An attacker supplying a malicious PKCS#11 token or module whose key and matching certificate use a 55- to 64-byte CKA_ID can overflow the client's stack during key enumeration, causing a crash.