Divide By Zero Affecting freerdp-devel package, versions <2:2.11.7-9.el8_10


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (15th percentile)

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  • Snyk IDSNYK-ALMALINUX8-FREERDPDEVEL-16686849
  • published14 May 2026
  • disclosed11 May 2026

Introduced: 11 May 2026

NewCVE-2026-31884  (opens in a new tab)
CWE-369  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 freerdp-devel to version 2:2.11.7-9.el8_10 or higher.
This issue was patched in ALSA-2026:16019.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp-devel package and not the freerdp-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1