CVE-2026-33983

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.

PUBLISHED Reserved 2026-03-24 | Published 2026-03-30 | Updated 2026-03-31 | Assigner GitHub_M

Problem types

CWE-190: Integer Overflow or Wraparound

CWE-252: Unchecked Return Value

Product status

References

github.com/...reeRDP/security/advisories/GHSA-4gfm-4p52-h478

github.com/...ommit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425

cve.org (CVE-2026-33983)

nvd.nist.gov (CVE-2026-33983)

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