CVE-2026-23531
Publication date 19 January 2026
Last updated 3 February 2026
Ubuntu priority
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, in ClearCodec, when `glyphData` is present, `clear_decompress` calls `freerdp_image_copy_no_overlap` without validating the destination rectangle, allowing an out-of-bounds read/write via crafted RDPGFX surface updates. 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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| freerdp | 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| freerdp2 | 25.10 questing | Not in release |
| 24.04 LTS noble |
Fixed 2.11.5+dfsg1-1ubuntu0.1~esm3
|
|
| 22.04 LTS jammy |
Fixed 2.6.1+dfsg1-3ubuntu2.8
|
|
| 20.04 LTS focal |
Fixed 2.6.1+dfsg1-0ubuntu0.20.04.2+esm1
|
|
| 18.04 LTS bionic |
Fixed 2.2.0+dfsg1-0ubuntu0.18.04.4+esm3
|
|
| freerdp3 | 25.10 questing |
Vulnerable
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy | Not in release |
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| Package | Patch details |
|---|---|
| freerdp | |
| freerdp2 | |
| freerdp3 |
References
Related Ubuntu Security Notices (USN)
- USN-8004-1
- FreeRDP vulnerabilities
- 3 February 2026