Vulnerability · Published Apr 17, 2026 · Assigned by GitHub_M
CVE-2026-32623xrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
High 7.7
In plain English
A high-severity heap buffer overflow in xrdp from neutrinolabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in the NeutrinoRDP module. When proxying RDP sessions from xrdp to another server, the module fails to properly validate the size of reassembled fragmented virtual channel data against its allocated memory buffer. A malicious downstream RDP server (or an attacker capable of performing a Man-in-the-Middle attack) could exploit this flaw to cause memory corruption, potentially leading to a Denial of Service (DoS) or Remote Code Execution (RCE). The NeutrinoRDP module is not built by default. This vulnerability only affects environments where the module has been explicitly compiled and enabled. Users can verify if the module is built by checking for --enable-neutrinordp in the output of the xrdp -v command. This issue has been fixed in version 0.10.6.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-32623 |
| Alpine:v3.24 | xrdp | 0.10.6-r0 | ALPINE-CVE-2026-32623 |
| Debian:12 | xrdp | 0.9.21.1-1+deb12u3 | DEBIAN-CVE-2026-32623 |
| Debian:13 | xrdp | 0.10.1-3.1+deb13u2 | DEBIAN-CVE-2026-32623 |
| Debian:14 | xrdp | 0.10.6-1 | DEBIAN-CVE-2026-32623 |
| Ubuntu:22.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32623 |
| Ubuntu:24.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32623 |
| Ubuntu:25.10 | xrdp | no fix listed | UBUNTU-CVE-2026-32623 |
| Ubuntu:26.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-32623 |
| Ubuntu:26.10 | xrdp | no fix listed | UBUNTU-CVE-2026-32623 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| neutrinolabs | xrdp | < 0.10.6 |
Weakness: CWE-122 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-phw3-qp59-x2v4 x_refsource_CONFIRM
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 x_refsource_MISC