CVE-2026-109939
Medium
Description
FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in update_read_cache_bitmap_v3_order() in libfreerdp/core/orders.c, which accesses the client bitmap cache when the CBR3_DO_NOT_CACHE flag is set, even though the cache is not yet initialized before Demand Active. A malicious or compromised RDP server can send a Cache Bitmap V3 order during connection setup to crash a connecting client that has enabled the non-default Bitmap Cache V3 feature (/cache:codec:<rfx|nsc|jpeg>).
SeverityMedium
CVSS6.5
Exploit probability—
ProductFreerdp
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- freerdp freerdp3.32.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| freerdp freerdp | 3.27.1 ≤ v < 3.32.0 | 3.32.0 |
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