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CVE-2026-63633 is a heap-based buffer overflow in FreeRDP versions prior to 3.28.0. The Opus decoding path in freerdp_dsp_decode_opus incorrectly ensures capacity on an internal buffer rather than on the caller-supplied output stream to which libopus writes decoded PCM. An attacker-controlled RDP server can negotiate the Opus audio format and cause a decoded frame to exceed the fixed-size destination stream used by the RDP sound client channel, resulting in a heap overwrite.
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No public exploit code observed for this vulnerability.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A potentially remote-code-execution-capable heap buffer overflow in FreeRDP's Opus audio decoding path, triggered by a malicious RDP server under specific client build configurations.
A vulnerability addressed by the Alma Linux ALSA-2026:61378 FreeRDP/WinPR security update. The provided CVSS v2 vector indicates network-reachable impact to confidentiality, integrity, and availability, but no technical flaw description is supplied.
A remotely exploitable, low-complexity vulnerability affecting the Oracle Linux FreeRDP package update, rated critical under the cited CVSS v2 vector because confidentiality, integrity, and availability impacts are all complete.
A FreeRDP heap-buffer-overflow vulnerability in Opus audio decoding that permits arbitrary code execution.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.