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    CVE-2026-22855

    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.

    Published:Jan 14, 2026
    Last Modified:Apr 18, 2026
    EPS:Jan 14, 2026
    EPSS Score:0.00087
    CVSS Score:9.1

    Affected Products

    Vendor
    Freerdp
    Product
    Freerdp

    Exploits

    https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-rwp3-g84r-6mx9

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2026-85089 (CVSS 7.1) — FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info …
    CVE-2026-85090 (CVSS 5.3) — FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 functio…
    CVE-2026-69159 (CVSS 5.4) — ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2026-67306. Reason: This candidate is a duplica…
    CVE-2026-63633 (CVSS 7.7) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, freerdp_dsp_decode_opus in l…
    CVE-2026-63652 (CVSS 7.1) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, rdpsnd_server_recv_formats i…
    CVE-2026-63117 (CVSS 6.5) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, an authenticated RDP client …
    CVE-2026-55192 (CVSS 7.2) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backen…
    CVE-2026-55194 (CVSS 8.7) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in …
    CVE-2026-55648 (CVSS 6.1) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon…
    CVE-2026-55193 (CVSS 8.7) — FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP clients using TS Gat…

    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
    https://access.redhat.com/errata/RHSA-2026:4446
    https://access.redhat.com/errata/RHSA-2026:4471
    https://access.redhat.com/errata/RHSA-2026:4489
    https://access.redhat.com/security/cve/CVE-2026-22855
    https://bugzilla.redhat.com/show_bug.cgi?id=2429645
    https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22855.json

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High