CVE-2026-109242 FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgrade

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile-current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBTTILEFIRST then WBTTILEUPGRADE sequence to paint heap bytes onscreen or abort...

CVE-2026-109242 FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgrade

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile-current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBTTILEFIRST then WBTTILEUPGRADE sequence to paint heap bytes onscreen or abort...

CLSA-2026-1786029097 freerdp: Fix of 2 CVEs

CVE-2026-33983: fix undefined-behaviour shift and 80 billion iteration loop CPU denial of service in the progressive codec; make progressiverfxquantsub reject components where q1 q2 instead of letting the BYTE subtraction underflow into a bogus numBits shift exponent, and fail the tile upgrade...

CLSA-2026-1786028144 freerdp: Fix of 2 CVEs

CVE-2026-33983: fix undefined-behaviour shift and 80 billion iteration loop CPU denial of service in the progressive codec; make progressiverfxquantsub reject components where q1 q2 instead of letting the BYTE subtraction underflow into a bogus numBits shift exponent, and fail the tile upgrade...

CVE-2026-33983 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, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...

CVE-2026-33983

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...

CVE-2026-33983 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, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...

CVE-2026-33983 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, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...

CVE-2026-33983

FreeRDP , a free Remote Desktop Protocol implementation, is vulnerable to a Denial of Service (DoS) via a CPU-intensive loop. Prior to version 3.24.2 , the progressive_decompress_tile_upgrade() function fails to halt execution when a mismatch is detected via progressive_rfx_quant_cmp_equal(), mer...

CVE-2026-33983

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...

CVE-2026-33983

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressivedecompresstileupgrade detects a mismatch via progressiverfxquantcmpequal but only emits WLogWARN, execution continues. The wrapped value 247 is used as a shift exponent, causing undefined behavior...