CVE-2026-23530

Public on 2026-01-19
Modified on 2026-01-21
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0,`freerdp_bitmap_decompress_planar` does not validate `nSrcWidth`/`nSrcHeight` against `planar->maxWidth`/`maxHeight` before RLE decode. 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.
Severity
Important severity
Important
See what this means
CVSS v3 Base Score
7.6
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core freerdp Pending Fix
Amazon Linux 2023 freerdp Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
NVD CVSSv3 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-23530 Mitre: CVE-2026-23530