CVE-2026-23884FreeRDP is a free implementation of the Remote Desktop Protocol.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
freerdp freerdp freerdp:freerdp | before 3.21.0 | NVD |
References
- https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L114-L122product
- https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L87-L91product
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0release-notes
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cfgj-vc84-f3ppexploit, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2048
- https://access.redhat.com/errata/RHSA-2026:2081
- https://access.redhat.com/errata/RHSA-2026:2222
- https://access.redhat.com/errata/RHSA-2026:2714
- https://access.redhat.com/errata/RHSA-2026:2736
- https://access.redhat.com/errata/RHSA-2026:2770
- https://access.redhat.com/errata/RHSA-2026:2824
- https://access.redhat.com/errata/RHSA-2026:2952
- https://access.redhat.com/errata/RHSA-2026:3036
- https://access.redhat.com/errata/RHSA-2026:3037
- https://access.redhat.com/errata/RHSA-2026:3038
- https://access.redhat.com/errata/RHSA-2026:3039
- https://access.redhat.com/errata/RHSA-2026:3041
- https://access.redhat.com/security/cve/CVE-2026-23884
- https://bugzilla.redhat.com/show_bug.cgi?id=2430880
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23884.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.