VDB
DEBIAN-CVE-2026-31884
DEBIAN-CVE-2026-31884
PUBLISHED
CVSS 7.5 HIGH
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, division by zero in MS-ADPCM and IMA-ADPCM decoders when nBlockAlign is 0, leading to a crash. In libfreerdp/codec/dsp.c, both ADPCM decoders use size % block_size where block_size = context->common.format.nBlockAlign. The nBlockAlign value comes from the Server Audio Formats PDU on the RDPSND channel. The value 0 is not validated anywhere before reaching the decoder. When nBlockAlign = 0, the modulo operation causes a SIGFPE (floating point exception) crash. This vulnerability is fixed in 3.24.0.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | freerdp3 | 0, 3.15.0+dfsg-2.1, 3.16.0+dfsg-1 |
| Debian:13 | freerdp3 | 0, 3.15.0+dfsg-2.1, 3.15.0+dfsg-2.1+deb13u1 |
| Debian:12 | freerdp2 | 2.11.2+dfsg1-1, 2.11.2+dfsg1-1.1~exp1, 2.11.2+dfsg1-1.1~exp2 |
Timeline
- Mar 13, 2026 CVE Published
- Oct 1, 2026 CVE Updated