CVE-2026-91958
FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Index
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Reserved
- Sep 15, 2026
Description
FreeRDP versions before 3.31.0 fail to validate MonitorIds array values when parsing RDP connection files, allowing unbounded array indexing in xf_detect_monitors. Attackers can craft a malicious RDP file with an out-of-range selectedmonitors value to trigger out-of-bounds heap read and write operations when opened in xfreerdp.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.6 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- GitHub Security Advisory (GHSA-23pf-q83q-x45r)vendor-advisory
- VulnCheck Advisory: FreeRDP 3.11.0 through 3.30.0 Heap Buffer Overflow via Monitor Indexthird-party-advisory
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