FreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-controlled content, causing denial of service or heap corruption before authentication completes.
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Affected Vendors & Products
Advisories
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Fixes
Solution
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Workaround
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References
History
Tue, 15 Sep 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | FreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-controlled content, causing denial of service or heap corruption before authentication completes. | |
| Title | FreeRDP before 3.31.0 Heap Buffer Overflow via LB_LOAD_BALANCE_INFO | |
| First Time appeared |
Freerdp
Freerdp freerdp |
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| Weaknesses | CWE-120 | |
| CPEs | cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Freerdp
Freerdp freerdp |
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| References |
| |
| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-15T16:01:36.361Z
Reserved: 2026-09-15T11:07:34.398Z
Link: CVE-2026-91953
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-15T16:17:49.657
Modified: 2026-09-15T17:17:41.587
Link: CVE-2026-91953
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses