CVEvulnerability
CVE-2026-67299
8.7 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-08-01
- Last modified
- 2026-09-08
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-416
Description
FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOW_ICON_ORDER when AsyncUpdate is enabled (e.g. xfreerdp /async-update). In update_message_WindowIcon() a shallow CopyMemory() overwrites a freshly allocated lParam->iconInfo with the parser-owned windowIcon->iconInfo pointer. After the parser callback returns, update_recv_window_info_order() frees window_icon.iconInfo, but the queued async message still retains and later dispatches that stale pointer. A malicious or compromised RDP server sending a crafted RAIL Window Alternate Secondary Order with WINDOW_ORDER_ICON can trigger use-after-free, leading to memory corruption and client crash.
Affected configurations
• freerdp freerdp (< 3.29.0)
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://github.com/FreeRDP/FreeRDP/commit/5370fb26fbf034ecd11d3026b6ad639b5fff493f Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-34hq-hwjw-q8v3 Exploit, Vendor Advisory
- https://www.vulncheck.com/advisories/freerdp-before-use-after-free-via-windowicon-async-message Patch, Third Party Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-34hq-hwjw-q8v3 Exploit, Vendor Advisory