What’s Vulnerable › Vulnerabilities

CVE-2026-22855: FreeRDP has a heap-buffer-overflow in smartcard_unpack_set_attrib_call

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-14 · updated 2026-07-15
• Weakness: CWE-125

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.

Affected products

• FreeRDP: before 3.20.1 — fixed in 3.20.1

How to fix

Upgrade to a fixed version: FreeRDP 3.20.1. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rwp3-g84r-6mx9
• https://access.redhat.com/errata/RHSA-2026:19033
• https://access.redhat.com/errata/RHSA-2026:3067
• https://access.redhat.com/errata/RHSA-2026:3068
• https://access.redhat.com/errata/RHSA-2026:3334
• https://access.redhat.com/errata/RHSA-2026:3975
• https://access.redhat.com/errata/RHSA-2026:4121
• https://access.redhat.com/errata/RHSA-2026:4437
• https://access.redhat.com/errata/RHSA-2026:4438
• https://access.redhat.com/errata/RHSA-2026:4439
• https://access.redhat.com/errata/RHSA-2026:4440

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