VDB
DEBIAN-CVE-2026-23533
DEBIAN-CVE-2026-23533
PUBLISHED
CVSS 9.800000190734863 CRITICAL
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 RDPGFX ClearCodec decode path when maliciously crafted residual data causes out-of-bounds writes during color output. 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.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | freerdp3 | 0, 3.15.0+dfsg-2.1, 3.16.0+dfsg-1 |
| Debian:13 | freerdp3 | 0, 3.17.0+dfsg-1, 3.17.1+dfsg-1 |
| Debian:11 | freerdp2 | *, 2.11.7+dfsg1-2, 2.11.7+dfsg1-3 |
| Debian:12 | freerdp2 | 2.11.7+dfsg1-6, 2.11.7+dfsg1-6~deb12u1, * |
Timeline
- Jan 19, 2026 CVE Published
- May 16, 2026 CVE Updated