| Name | CVE-2026-56297 |
| Description | FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| freerdp2 (PTS) | bullseye | 2.3.0+dfsg1-2+deb11u1 | vulnerable |
| bullseye (security) | 2.3.0+dfsg1-2+deb11u3 | vulnerable | |
| bookworm | 2.11.7+dfsg1-6~deb12u1 | vulnerable | |
| freerdp3 (PTS) | trixie | 3.15.0+dfsg-2.1+deb13u3 | vulnerable |
| forky, sid | 3.30.0+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| freerdp2 | source | (unstable) | (unfixed) | |||
| freerdp3 | source | (unstable) | 3.22.0+dfsg-1 |
[trixie] - freerdp3 <no-dsa> (Minor issue)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3mv2-5q57-2v8h
https://github.com/FreeRDP/FreeRDP/commit/e02e052f6692550e539d10f99de9c35a23492db2 (3.22.0)
https://github.com/FreeRDP/FreeRDP/commit/cb7f295bc750de86480d60a3b58cebc56a57a1c4 (3.22.0)