Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the winpr_aligned_recalloc() call. If realloc fails, size is inflated while pixels still points to the old, smaller buffer. On a subsequent call where count <= size (the inflated value), realloc is skipped. The caller then writes count * bpp bytes of attacker-controlled pixel data into the undersized buffer, causing a heap buffer overflow. This issue has been patched in version 3.24.2.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freerdp | Freerdp | < 3.24.2 |
Related Weaknesses (CWE)
References
- https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06aPatch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6PatchVendor Advisory
FAQ
What is CVE-2026-33984?
CVE-2026-33984 is a vulnerability with a CVSS score of 7.5 (HIGH). FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the ...
How severe is CVE-2026-33984?
CVE-2026-33984 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33984?
Check the references section above for vendor advisories and patch information. Affected products include: Freerdp Freerdp.