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CVE-2026-23534

CRITICAL

9.8

Beschreibung

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

CVE Details

CVSS v3.1 Bewertung9.8

SchweregradCRITICAL

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionNONE

Veroffentlicht1/19/2026

Zuletzt geandert1/28/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

freerdp:freerdp

Schwachen (CWE)

CWE-122

Referenzen

https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879(security-advisories@github.com)

https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884(security-advisories@github.com)

https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0(security-advisories@github.com)

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599(security-advisories@github.com)

IOC Korrelationen

Keine Korrelationen erfasst

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