Heap Out-of-Bounds Read in FreeRDP's Smartcard SetAttrib Path
CVE-2026-22855

5.6MEDIUM

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
14 January 2026

What is CVE-2026-22855?

FreeRDP, a free implementation of the Remote Desktop Protocol, contains a vulnerability in the smartcard SetAttrib path. This occurs when the cbAttrLen does not match the actual NDR buffer length, leading to a heap out-of-bounds read. Users should upgrade to version 3.20.1 or later to mitigate this issue. For more information, visit the official advisory and release notes.

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Deploy the Patch

Affected Version(s)

FreeRDP < 3.20.1

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
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CVSS V4

Score:
5.6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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