Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, global-buffer-overflow was observed in FreeRDP's Base64 decoding path. The root cause appears to be implementation-defined char signedness: on Arm/AArch64 builds, plain char is treated as unsigned, so the guard c <= 0 can be optimized into a simple c != 0 check. As a result, non-ASCII bytes (e.g., 0x80-0xFF) may bypass the intended range restriction and be used as an index into a global lookup table, causing out-of-bounds access. This vulnerability is fixed in 3.20.1.
INFO
Published Date :
2026-01-14T17:56:29.729Z
Last Modified :
2026-01-14T21:12:03.734Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-22858 vulnerability.
| Vendors | Products |
|---|---|
| Freerdp |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-22858.
