PT-2026-25337 · Freerdp+1 · Freerdp+1

Yjk0805 · Published 2026-01-01 · Updated 2026-05-22 · CVE-2026-31884

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.24.0

Description FreeRDP is a free implementation of the Remote Desktop Protocol. A division by zero error exists in the MS-ADPCM and IMA-ADPCM decoders when the nBlockAlign variable is 0, resulting in a crash. The issue occurs in libfreerdp/codec/dsp.c where the decoders use size % block size, with block size equal to context->common.format.nBlockAlign. The nBlockAlign value originates from the Server Audio Formats PDU on the RDPSND channel and is not validated before being used in the decoder. When nBlockAlign is 0, a SIGFPE (floating point exception) crash occurs.

Recommendations Versions prior to 3.24.0 should be updated to version 3.24.0 or later.

Exploit

Fix

Divide By Zero

Weakness Enumeration

CWE-369

Related Identifiers

ALSA-2026:16014

ALSA-2026:16019

ALSA-2026:16482

BDU:2026-04143

CVE-2026-31884

GHSA-JP7M-94WW-P56R

OESA-2026-2439

OESA-2026-2440

OESA-2026-2441

OESA-2026-2442

OPENSUSE-SU-2026:10408-1

OPENSUSE-SU-2026:20657-1

SUSE-SU-2026:1632-1

SUSE-SU-2026:1633-1

SUSE-SU-2026:1634-1

SUSE-SU-2026:1635-1

SUSE-SU-2026:1640-1

SUSE-SU-2026:21436-1

Affected Products

Freerdp

Rocky Linux

References · 89

• 🔥 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jp7m-94ww-p56r · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31884.json · Exploit
• https://github.com/FreeRDP/FreeRDP/commit/03b48b3601d867afccac1cdc6081de7a275edce7 · Patch
• https://github.com/FreeRDP/FreeRDP/commit/16df2300e1e3f5a51f68fb1626429e58b531b7c8 · Patch
• https://errata.almalinux.org/8/ALSA-2026-16019.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:16482 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-29775 · Security Note
• https://linux.oracle.com/errata/ELSA-2026-16482.html · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2440 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2026:16482 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-31884 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2026:16019 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-29774 · Security Note
• https://errata.almalinux.org/10/ALSA-2026-16014.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-25954 · Security Note