High
Security advisory
In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. This is fixed in version 2.1.2.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-4031
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:41 UTC · Revision 1
Source evidence
In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. This is fixed in version 2.1.2.
osv:CVE-2020-4031
Complete source record
{
"id": "d334fe4cd3456d4d25a042f719ba5db17ee993f448bf23b92814b418c786bd93",
"url": "https://osv.dev/vulnerability/CVE-2020-4031",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-4031",
"summary": "In FreeRDP before version 2.1.2, there is a use-after-free in gdi_SelectObject. All FreeRDP clients using compatibility mode with /relax-order-checks are affected. This is fixed in version 2.1.2.",
"evidence": "osv:CVE-2020-4031",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2020-4031",
"aliases": [
"CVE-2020-4031",
"GHSA-gwcq-hpq2-m74g"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/freerdp/freerdp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "584efae073386e8c5f6bc265b05c87d508a9bcbc"
},
{
"fixed": "6d86e20e1e7caaab4f0c7f89e36d32914dbccc52"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.1.2"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "6d86e20e1e7caaab4f0c7f89e36d32914dbccc52"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"2.1.1",
"2.1.0",
"2.0.0",
"2.0.0-rc4",
"2.0.0-rc3",
"2.0.0-rc2",
"2.0.0-rc1",
"2.0.0-rc0",
"2.0.0-beta1+android11",
"2.0.0-beta1+android10",
"1.2.0-beta1+android9",
"1.2.0-beta1+android7",
"1.1.0-beta+2013071101",
"1.1.0-beta1+ios4",
"1.1.0-beta1+android5",
"1.1.0-beta1+android4",
"1.1.0-beta1+ios3",
"1.1.0-beta1+ios2",
"1.1.0-beta1+android3",
"1.1.0-beta1+android2",
"1.1.0-beta1+ios1",
"1.1.0-beta1",
"1.0.1",
"1.0.0",
"1.0-beta5",
"1.0-beta4",
"1.0-beta2",
"1.0-beta1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-4031.json",
"vanir_signatures": [
{
"id": "CVE-2020-4031-6d8a4e80",
"digest": {
"threshold": 0.9,
"line_hashes": [
"206824409836018329107931826041728959867",
"260941141889332641186153920543010721710",
"244372807494333150934362210269961780669",
"11220332270728209492738135928567876790",
"109709125800227540552630846963918169160",
"280502749591609004556720326341572702766",
"272391707204034853583769809678780120114",
"153041246365193990729603684708156713072",
"297327554412935137345118440425799656686",
"234476187276609072557850772052902601274",
"320116423252867463164242454449601887554"
]
},
"source": "https://github.com/freerdp/freerdp/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52",
"target": {
"file": "server/shadow/shadow_server.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2020-4031-71f28b03",
"digest": {
"length": 1409,
"function_hash": "327365352117490775117547188598520203541"
},
"source": "https://github.com/freerdp/freerdp/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52",
"target": {
"file": "server/shadow/shadow_server.c",
"function": "shadow_server_start"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T14:13:50Z"
}
}
],
"modified": "2026-10-20T14:13:50.296843586Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6Y35HBHG2INICLSGCIKNAR7GCXEHQACQ/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XOZLH35OJWIQLM7FYDXAP2EAUBDXE76V/",
"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gwcq-hpq2-m74g",
"https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html",
"https://usn.ubuntu.com/4481-1/",
"https://github.com/FreeRDP/FreeRDP/commit/6d86e20e1e7caaab4f0c7f89e36d32914dbccc52"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "20.04"
},
{
"last_affected": "20.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "31"
},
{
"last_affected": "31"
},
{
"introduced": "32"
},
{
"last_affected": "32"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.1"
},
{
"last_affected": "15.1"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-4031",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388727,
"published_at": "2020-06-22T22:15:13.163+00:00"
}