7.7
High
CVE-2026-23534 FreeRDP is a free implementation of the Remote Desktop Protocol
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRDP 3.21 | earliest → < 3.21.0 | 3.21.0 |
| Red Hat Enterprise Linux AppStream EUS (v. 10.0) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 10) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 8) | Versions not published | |
| Red Hat Enterprise Linux AppStream EUS (v.9.4) | Versions not published | |
| Red Hat Enterprise Linux AppStream EUS (v.9.6) | Versions not published | |
| Red Hat Enterprise Linux AppStream (v. 9) | Versions not published | |
| Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) | Versions not published | |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) | Versions not published |
Show the 12 other branches Hide the 12 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux CRB (v. 8) | Versions not published | |
| Red Hat CodeReady Linux Builder EUS (v.9.4) | Versions not published | |
| Red Hat CodeReady Linux Builder EUS (v.9.6) | Versions not published | |
| Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) | Versions not published | |
| Red Hat Enterprise Linux 6 | Versions not published | |
| Red Hat Enterprise Linux 7 | Versions not published | |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 10.0 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Enterprise Linux 9.4 Extended Update Support | Versions not published | |
| Red Hat Enterprise Linux 9.6 Extended Update Support | Versions not published |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
Other CVEs of FreeRDP
The 324 CVEs of FreeRDP →
CVE-2026-121964
FreeRDP before 3.32.2 Heap Buffer Overflow via rpc_client_recv_fragment
8.7
High
CVE-2026-121962
FreeRDP before 3.32.2 Heap Buffer Overflow via Early User Authorization Read
7.2
High
CVE-2026-121963
FreeRDP before 3.32.2 Use-After-Free via Dynamic rdpsnd Channel Close
8.2
High
CVE-2026-121961
FreeRDP before 3.32.2 Use-After-Free via DRDYNVC Tracker Race
8.2
High