CVE-2026-23883
Heap-use-after-free in update_pointer_new
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, `xf_Pointer_New` frees `cursorPixels` on failure, then `pointer_free` calls `xf_Pointer_Free` and frees it again, triggering ASan UAF. 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.
| CWE | CWE-416 |
| Vendor | freerdp |
| Product | freerdp |
| Published | Jan 19, 2026 |
| Last Updated | Jun 30, 2026 |
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Affected Versions
FreeRDP / FreeRDP
< 3.21.0
References
github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qcrr-85qx-4p6x github.com: https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L312-L319 github.com: https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L340 github.com: https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/pointer.c#L164-L174 github.com: https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-23883 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2430885 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23883.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2952 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2222 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2081 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2770 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2824 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2736 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:3037 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2048