Vulnerability · Published Oct 21, 2026 · Assigned by VulnCheck
CVE-2026-114045FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
High 8.8
In plain English
A high-severity heap buffer overflow in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | freerdp | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-devel | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-libs | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | freerdp-server | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | libwinpr | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| AlmaLinux:10 | libwinpr-devel | 2:3.32.2-1.el10_2 | ALSA-2026:94514 |
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-114045 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-114045 |
| Debian:14 | freerdp3 | 3.32.1+dfsg-1 | DEBIAN-CVE-2026-114045 |
| Rocky Linux:10 | freerdp | 2:3.32.2-1.el10_2 | RLSA-2026:94514 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-114045 |
| Ubuntu:24.04:LTS | freerdp3 | 3.32.1+dfsg-0ubuntu0.24.04.1 | UBUNTU-CVE-2026-114045 |
| Ubuntu:26.04:LTS | freerdp3 | 3.32.1+dfsg-0ubuntu0.26.04.1 | UBUNTU-CVE-2026-114045 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-3m9q-g533-rqjq) vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format third-party-advisory