VDB
DEBIAN-CVE-2026-33977
DEBIAN-CVE-2026-33977
PUBLISHED
CVSS 6.5 MEDIUM
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | freerdp2 | 0, 2.10.0+dfsg1, 2.10.0+dfsg1 |
| Debian:11 | freerdp2 | 2.11.7+dfsg1, 2.11.7+dfsg1, 2.11.7+dfsg1 |
| Debian:14 | freerdp3 | 3.22.0+dfsg, 3.16.0+dfsg-1, 3.17.0+dfsg-1 |
| Debian:13 | freerdp3 | 3.15.0+dfsg-2.1, 3.16.0+dfsg-1, 3.17.0+dfsg-1 |
Timeline
- Mar 30, 2026 CVE Published
- May 16, 2026 CVE Updated