CVE-2026-44978

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-44978
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44978.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44978
Aliases
  • GHSA-9cg5-f7m7-ppvj
Downstream
Related
Published
2026-07-20T16:56:03Z
Modified
2026-08-19T18:52:12Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
xrdp: Unchecked FIPS padding length in standard RDP Security causes heap out-of-bounds read in HMAC verification
Details

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a heap out-of-bounds read vulnerability within the FIPS-specific receive paths. This vulnerability does not affect the default configuration of xrdp. The vulnerability is only exploitable when the security layer is set to security_layer=negotiate or security_layer=rdp, and the crypto level is changed to crypt_level=fips in xrdp.ini. In this specific non-default mode, the server fails to validate the FIPS padding length field, leading to a pointer underflow and a subsequent negative length calculation. An unauthenticated remote attacker can exploit this by sending a crafted FIPS-protected PDU, causing a heap out-of-bounds read that results in a process crash and denial of service (DoS). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. This issue has been fixed in version 0.10.6.1.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-125",
        "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44978.json"
}
References

Affected packages

Git / github.com/neutrinolabs/xrdp

Affected ranges

Type
GIT
Repo
https://github.com/neutrinolabs/xrdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
80c52879fead585d6347df5b3c587718adf8f5a5
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.10.6.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.10.0
v0.10.0-beta.1
v0.10.0-beta.2
v0.10.0-beta.3
v0.10.1
v0.10.2
v0.10.2-rc.1
v0.10.3
v0.10.4
v0.10.4.1
v0.10.5
v0.10.6
v0.10.6.1-rc.1
v0.9.10
v0.9.11
v0.9.12
v0.9.13
v0.9.14
v0.9.15
v0.9.16
v0.9.17
v0.9.18
v0.9.2
v0.9.3
v0.9.3.rc1
v0.9.4
v0.9.4.rc1
v0.9.5
v0.9.6
v0.9.7
v0.9.8
v0.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44978.json"