FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, freerdp_dsp_decode_opus in libfreerdp/codec/dsp.c calls Stream_EnsureRemainingCapacity on context->common.buffer even though opus_decode writes decoded PCM into the caller-supplied out stream. A malicious RDP server that negotiates WAVE_FORMAT_OPUS with a client built with WITH_OPUS enabled and WITH_DSP_FFMPEG disabled can make libopus write a large decoded frame beyond the 4096-byte StreamPool_Take destination used by channels/rdpsnd/client/rdpsnd_main.c. This can corrupt the client heap, crash the client, and may permit code execution. This issue is fixed in version 3.28.0.

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:61378 advisory.

    * FreeRDP: FreeRDP: Resource exhaustion due to oversized chunked HTTP responses (CVE-2026-67297)
      * FreeRDP: FreeRDP: Memory disclosure or denial of service via crafted RDP update orders     (CVE-2026-67301)
      * FreeRDP: FreeRDP: Denial of Service via crafted smartcard cache requests (CVE-2026-67288)
      * FreeRDP: FreeRDP: Denial of Service via heap out-of-bounds read (CVE-2026-67291)
      * FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing (CVE-2026-67296)
      * FreeRDP: FreeRDP: Denial of Service via null pointer dereference in smartcard cleanup (CVE-2026-67304)
      * FreeRDP: FreeRDP: Denial of Service via integer underflow in RAIL channel handling (CVE-2026-67298)
      * FreeRDP: FreeRDP: Out-of-bounds memory access in Kerberos decryption (CVE-2026-73242)
      * FreeRDP: FreeRDP: Authentication bypass via incorrect RDSTLS PDU handling (CVE-2026-73241)
      * FreeRDP: FreeRDP: Denial of Service and heap corruption via malformed RDP audio PDU (CVE-2026-63652)
      * FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response     (CVE-2026-55194)
      * freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in Opus audio decode     (CVE-2026-63633)
      * FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service and information disclosure     (CVE-2026-69159)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-613780 advisory.

    - Backport several CVE fixes (CVE-2026-55194, CVE-2026-63633, CVE-2026-63652,       CVE-2026-67288, CVE-2026-67291, CVE-2026-67296, CVE-2026-67297,       CVE-2026-67301, CVE-2026-67304, CVE-2026-69159, CVE-2026-73241)       Resolves: RHEL-245652, RHEL-245635, RHEL-245599, RHEL-245539, RHEL-238534       Resolves: RHEL-236056, RHEL-227734, RHEL-225225, RHEL-225097, RHEL-224250       Resolves: RHEL-224185

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:61378 advisory.

    * FreeRDP: FreeRDP: Resource exhaustion due to oversized chunked HTTP responses (CVE-2026-67297)

    * FreeRDP: FreeRDP: Memory disclosure or denial of service via crafted RDP update orders (CVE-2026-67301)

    * FreeRDP: FreeRDP: Denial of Service via crafted smartcard cache requests (CVE-2026-67288)

    * FreeRDP: FreeRDP: Denial of Service via heap out-of-bounds read (CVE-2026-67291)

    * FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing (CVE-2026-67296)

    * FreeRDP: FreeRDP: Denial of Service via null pointer dereference in smartcard cleanup (CVE-2026-67304)

    * FreeRDP: FreeRDP: Denial of Service via integer underflow in RAIL channel handling (CVE-2026-67298)

    * FreeRDP: FreeRDP: Out-of-bounds memory access in Kerberos decryption (CVE-2026-73242)

    * FreeRDP: FreeRDP: Authentication bypass via incorrect RDSTLS PDU handling (CVE-2026-73241)

    * FreeRDP: FreeRDP: Denial of Service and heap corruption via malformed RDP audio PDU (CVE-2026-63652)

    * FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response     (CVE-2026-55194)

    * freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in Opus audio decode     (CVE-2026-63633)

    * FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service and information disclosure     (CVE-2026-69159)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:61378 advisory.

    FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license.
    The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

    Security Fix(es):

    * FreeRDP: FreeRDP: Resource exhaustion due to oversized chunked HTTP responses (CVE-2026-67297)

    * FreeRDP: FreeRDP: Memory disclosure or denial of service via crafted RDP update orders (CVE-2026-67301)

    * FreeRDP: FreeRDP: Denial of Service via crafted smartcard cache requests (CVE-2026-67288)

    * FreeRDP: FreeRDP: Denial of Service via heap out-of-bounds read (CVE-2026-67291)

    * FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing (CVE-2026-67296)

    * FreeRDP: FreeRDP: Denial of Service via null pointer dereference in smartcard cleanup (CVE-2026-67304)

    * FreeRDP: FreeRDP: Denial of Service via integer underflow in RAIL channel handling (CVE-2026-67298)

    * FreeRDP: FreeRDP: Out-of-bounds memory access in Kerberos decryption (CVE-2026-73242)

    * FreeRDP: FreeRDP: Authentication bypass via incorrect RDSTLS PDU handling (CVE-2026-73241)

    * FreeRDP: FreeRDP: Denial of Service and heap corruption via malformed RDP audio PDU (CVE-2026-63652)

    * FreeRDP: FreeRDP: Heap-buffer-overflow allows arbitrary code execution via crafted RPC response     (CVE-2026-55194)

    * freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in Opus audio decode     (CVE-2026-63633)

    * FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service and information disclosure     (CVE-2026-69159)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0, freerdp_dsp_decode_opus     in libfreerdp/codec/dsp.c calls Stream_EnsureRemainingCapacity on context->common.buffer even though     opus_decode writes decoded PCM into the caller-supplied out stream. A malicious RDP server that negotiates     WAVE_FORMAT_OPUS with a client built with WITH_OPUS enabled and WITH_DSP_FFMPEG disabled can make libopus     write a large decoded frame beyond the 4096-byte StreamPool_Take destination used by     channels/rdpsnd/client/rdpsnd_main.c. This can corrupt the client heap, crash the client, and may permit     code execution. This issue is fixed in version 3.28.0. (CVE-2026-63633)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
343085	AlmaLinux 10 : freerdp (ALSA-2026:61378)	Nessus	Alma Linux Local Security Checks	Local	high
342750	Oracle Linux 10 : ELSA-2026-61378-0: / freerdp (ELSA-2026-613780)	Nessus	Oracle Linux Local Security Checks	Local	high
342170	RockyLinux 10 : freerdp (RLSA-2026:61378)	Nessus	Rocky Linux Local Security Checks	Local	high
341731	RHEL 10 : freerdp (RHSA-2026:61378)	Nessus	Red Hat Local Security Checks	Local	high
338294	Linux Distros Unpatched Vulnerability : CVE-2026-63633	Nessus	Misc.	Local	high

Detections

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CVE-2026-63633

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Tenable Plugins

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