CVE-2026-114045
FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
- State
- Published
- Severity
- 8.7 High
- Published
- Oct 21, 2026
- Updated
- Oct 21, 2026
- Reserved
- Oct 20, 2026
Description
FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- GitHub Security Advisory (GHSA-3m9q-g533-rqjq)vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_formatthird-party-advisory
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