CVEvulnerability
CVE-2026-55827
8.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-10
- Last modified
- 2026-07-15
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-131, CWE-787
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.1, FreeRDP clients launched with the non-default /cache:codec:rfx option pass desktop stride and height to RemoteFX decoding for Cache Bitmap V3 data while allocating bitmap->data only for the smaller DstWidth and DstHeight in gdi_Bitmap_Decompress, allowing a malicious RDP server to trigger a heap out-of-bounds write with attacker-controlled offset and content. This issue is fixed in version 3.27.1.
Affected configurations
• freerdp freerdp (< 3.27.1)
Related
References
- https://github.com/FreeRDP/FreeRDP/commit/e58adf922ea4c0d5495e59a1fe488d70092e0e3e Patch
- https://github.com/FreeRDP/FreeRDP/pull/12899 Patch
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.1 Release Notes
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c495-h83v-3prp Exploit, Mitigation, Vendor Advisory
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c495-h83v-3prp Exploit, Mitigation, Vendor Advisory