Reachable Assertion Affecting freerdp3 package, versions <3.24.2+dfsg-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.26% (17th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FREERDP3-15805315
  • published29 Mar 2026
  • disclosed30 Mar 2026

Introduced: 29 Mar 2026

CVE-2026-33977  (opens in a new tab)
CWE-617  (opens in a new tab)

How to fix?

Upgrade Debian:unstable freerdp3 to version 3.24.2+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1