Bug 2519826 (CVE-2026-63633) - CVE-2026-63633 freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in Opus audio decode
Summary: CVE-2026-63633 freerdp: FreeRDP: Arbitrary code execution via heap buffer ove...
Keywords:
Status: NEW
Alias: CVE-2026-63633
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-19 18:17 UTC by OSIDB Bzimport
Modified: 2026-08-20 16:10 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-19 18:17:47 UTC 
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.
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