Bug 2453224 (CVE-2026-33977) - CVE-2026-33977 FreeRDP: FreeRDP: Denial of Service via malformed IMA ADPCM audio data
Summary: CVE-2026-33977 FreeRDP: FreeRDP: Denial of Service via malformed IMA ADPCM au...
Keywords:
Status: NEW
Alias: CVE-2026-33977
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2453254 2453256 2453255
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-30 22:02 UTC by OSIDB Bzimport
Modified: 2026-03-30 23:12 UTC (History)
0 users

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Description OSIDB Bzimport 2026-03-30 22:02:11 UTC 
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.
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