CVE-2026-23884
Heap-use-after-free in gdi_set_bounds
- State
- Published
- Severity
- 7.7 High
- Published
- Jan 19, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jan 16, 2026
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.7 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:P | GitHub_M |
| 3.1 | 7.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H | redhat-SADP |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cfgj-vc84-f3pp
- https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L114-L122
- https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L87-L91
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
- https://access.redhat.com/security/cve/CVE-2026-23884vdb-entry
- RHBZ#2430880issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23884.json
- https://access.redhat.com/errata/RHSA-2026:2714vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2952vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2222vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2081vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3039vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3038vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3036vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3041vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2770vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2824vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2736vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:3037vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2048vendor-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.