CVE-2026-63633Critical· 9.8▾ MidnightFreeRDP 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…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 9.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
— → 8.8
none → high
Last analysed / modified upstream
8.8 → 9.8
high → critical
0.5% → 0.6%
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.
freerdp < 3.28.0Upgrade past the affected range:
freerdp 3.28.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-55193High· 8.8FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-73241High· 7.5FreeRDP is a free implementation of the Remote Desktop Protocol