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Details of issue NIXPKGS-2026-0883

NIXPKGS-2026-0883
published on 31 Mar 2026
Permalink CVE-2026-33983
6.5 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): NONE
  • Availability impact (A): HIGH
updated 15 hours ago by @mweinelt Activity log
  • Created automatic suggestion 1 day ago
  • @mweinelt accepted 16 hours ago
  • @mweinelt published on GitHub 15 hours ago
FreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS

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.

References

Affected products

FreeRDP
  • ==< 3.24.2

Matching in nixpkgs

Package maintainers

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478