CVEvulnerability
CVE-2026-31884
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-03-13
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-369
Description
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.
Affected configurations
• freerdp freerdp (< 3.24.0)
Related
Weakness · CWE (1)
- CWE-369 Divide By Zero weakness
References
- https://github.com/FreeRDP/FreeRDP/commit/03b48b3601d867afccac1cdc6081de7a275edce7 Patch
- https://github.com/FreeRDP/FreeRDP/commit/16df2300e1e3f5a51f68fb1626429e58b531b7c8 Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jp7m-94ww-p56r Exploit, Patch, Vendor Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jp7m-94ww-p56r Exploit, Patch, Vendor Advisory