CVE-2026-55827
High
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clients launched with the non-default /cache:codec:rfx option pass desktop stride and height to RemoteFX decoding for Cache Bitmap V3 data while allocating bitmap->data only for the smaller DstWidth and DstHeight in gdi_Bitmap_Decompress, allowing a malicious RDP server to trigger a heap out-of-bounds write with attacker-controlled offset and content. This issue is fixed in version 3.27.1.
SeverityHigh
CVSS7.5
Exploit probability—
ProductFreerdp
PublishedJul 10, 2026
First seenJul 10, 2026
Weakness typeCWE-131CWE-131CWE-787Out-of-bounds write
How to fix
Update
- freerdp freerdp3.27.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | v < 3.27.1 | 3.27.1 |
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