CVE-2026-22855
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductFreerdp
PublishedJan 14, 2026
First seenJan 14, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- freerdp freerdp3.20.1 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:4471
- access.redhat.com/errata/RHSA-2026:4121
- access.redhat.com/errata/RHSA-2026:3068
- access.redhat.com/errata/RHSA-2026:19033
- access.redhat.com/errata/RHSA-2026:3334
- access.redhat.com/errata/RHSA-2026:4439
- access.redhat.com/errata/RHSA-2026:4446
- access.redhat.com/errata/RHSA-2026:4440
- access.redhat.com/errata/RHSA-2026:4489
- access.redhat.com/errata/RHSA-2026:4437
- access.redhat.com/errata/RHSA-2026:4438
- access.redhat.com/errata/RHSA-2026:3975
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | v < 3.20.1 | 3.20.1 |
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