CVEvulnerability
CVE-2026-64621
9.3 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-20
- Last modified
- 2026-07-28
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.3 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.3 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
- Weaknesses
- CWE-415
Description
FreeRDP before 3.28.0 (affected 3.x through 3.27.1) contains a double-free vulnerability in freerdp_client_rdp_file_apply_to_settings() (client/common/file.c) when parsing the selectedmonitors field of a .rdp connection file. The MonitorIds array is allocated through the settings object, and a raw non-owning pointer to it is freed on the strtoul error path without clearing settings->MonitorIds, leaving it dangling; at teardown freerdp_settings_free() frees the same buffer again. An attacker who convinces a victim to open a crafted .rdp file with oversized monitor tokens can trigger a size-controlled double-free in any FreeRDP CLI client (xfreerdp/sdl-freerdp/wlfreerdp) in the default configuration.
Affected configurations
• freerdp freerdp (>= 3.0.0 < 3.28.0)
Related
Weakness · CWE (1)
- CWE-415 Double Free weakness
References
- https://github.com/FreeRDP/FreeRDP/commit/1f7a716d39b5605bb8a83b0c3c97a6ce386609ef Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f27x-frr8-j9hc Exploit, Mitigation, Vendor Advisory
- https://www.vulncheck.com/advisories/freerdp-before-double-free-via-selectedmonitors Patch, Third Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f27x-frr8-j9hc Exploit, Mitigation, Vendor Advisory