CriticalFix available
freerdp, freerdp2 and 1 more products — security advisory
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
- Products
- freerdp, freerdp2, freerdp3
- Affected versions
- 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1, 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1, 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2, 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1, 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2, 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3, 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4, 2.0.0~git20170725.1.1648deb+dfsg1-1, 2.0.0~git20170725.1.1648deb+dfsg1-5, 2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1, 2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2, 2.0.0~git20170725.1.1648deb+dfsg1-6, 2.0.0~git20170725.1.1648deb+dfsg1-6build1, 2.0.0~git20170725.1.1648deb+dfsg1-7, 2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1, 2.0.0~git20190204.1.2693389a+dfsg1-1, 2.0.0~git20190204.1.2693389a+dfsg1-2, 2.0.0~git20190204.1.2693389a+dfsg1-2build1, 2.0.0~git20190204.1.2693389a+dfsg1-2build2, 2.1.1+dfsg1-0ubuntu0.18.04.1, 2.1.1+dfsg1-0ubuntu0.20.04.1, 2.10.0+dfsg1-1.1ubuntu1, 2.11.2+dfsg1-1, 2.11.2+dfsg1-1build1, 2.11.2+dfsg1-1build3, 2.11.5+dfsg1-1build1, 2.11.5+dfsg1-1build2, 2.2.0+dfsg1-0ubuntu0.18.04.1, 2.2.0+dfsg1-0ubuntu0.18.04.2, 2.2.0+dfsg1-0ubuntu0.18.04.3, 2.2.0+dfsg1-0ubuntu0.18.04.4, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm1, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm2, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm3, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm4, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm5, 2.2.0+dfsg1-0ubuntu0.18.04.4+esm6, 2.2.0+dfsg1-0ubuntu0.20.04.1, 2.2.0+dfsg1-0ubuntu0.20.04.2, 2.2.0+dfsg1-0ubuntu0.20.04.3, 2.2.0+dfsg1-0ubuntu0.20.04.4, 2.2.0+dfsg1-0ubuntu0.20.04.5, 2.2.0+dfsg1-0ubuntu0.20.04.6, 2.3.0+dfsg1-2build1, 2.3.0+dfsg1-2ubuntu1, 2.3.0+dfsg1-2ubuntu2, 2.4.1+dfsg1-1, 2.4.1+dfsg1-1ubuntu1, 2.4.1+dfsg1-1ubuntu2, 2.5.0+dfsg1-1, 2.6.0+dfsg1-1, 2.6.1+dfsg1-0ubuntu0.20.04.1, 2.6.1+dfsg1-0ubuntu0.20.04.2, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm1, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm2, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm3, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm4, 2.6.1+dfsg1-1, 2.6.1+dfsg1-3, 2.6.1+dfsg1-3ubuntu1, 2.6.1+dfsg1-3ubuntu2, 2.6.1+dfsg1-3ubuntu2.1, 2.6.1+dfsg1-3ubuntu2.10, 2.6.1+dfsg1-3ubuntu2.11, 2.6.1+dfsg1-3ubuntu2.2, 2.6.1+dfsg1-3ubuntu2.3, 2.6.1+dfsg1-3ubuntu2.4, 2.6.1+dfsg1-3ubuntu2.5, 2.6.1+dfsg1-3ubuntu2.6, 2.6.1+dfsg1-3ubuntu2.7, 2.6.1+dfsg1-3ubuntu2.8, 2.6.1+dfsg1-3ubuntu2.9, 3.14.0+dfsg-1ubuntu1, 3.15.0+dfsg-2.1, 3.16.0+dfsg-1ubuntu1, 3.16.0+dfsg-2, 3.16.0+dfsg-2ubuntu0.1, 3.4.0+dfsg1-0ubuntu2, 3.4.0+dfsg1-0ubuntu3, 3.4.0+dfsg1-0ubuntu4, 3.5.0+dfsg1-0ubuntu1, 3.5.1+dfsg1-0ubuntu1, 3.5.1+dfsg1-0ubuntu1.1, 3.5.1+dfsg1-0ubuntu1.2
- Fixed versions
- 3.16.0+dfsg-2ubuntu0.3, 3.5.1+dfsg1-0ubuntu1.4
- CVEs
- CVE-2026-23884
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:19 UTC · Revision 1
Source evidence
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
osv:UBUNTU-CVE-2026-23884
freerdp
Fixed versions: Not specified
freerdp2
Fixed versions: Not specified
freerdp
Fixed versions: Not specified
freerdp2
Fixed versions: Not specified
freerdp2
Fixed versions: Not specified
freerdp2
Fixed versions: Not specified
freerdp3
Fixed versions: 3.5.1+dfsg1-0ubuntu1.4
freerdp3
Fixed versions: 3.16.0+dfsg-2ubuntu0.3
Complete source record
{
"id": "c8b7d11aeeeb434fb3a9c55d13ff5b3d4b9da146606f2aa5bd92376b930e31f0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-23884",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-23884",
"summary": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi->drawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.",
"evidence": "osv:UBUNTU-CVE-2026-23884",
"products": [
{
"name": {
"value": "freerdp",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3",
"evidence": "/affected/0/versions"
},
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "freerdp2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-5",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-6",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-6build1",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-7",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.1.1+dfsg1-0ubuntu0.18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.3",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm3",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm4",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm5",
"evidence": "/affected/1/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "freerdp",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1",
"evidence": "/affected/2/versions"
},
{
"value": "1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "freerdp2",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.0~git20190204.1.2693389a+dfsg1-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.0~git20190204.1.2693389a+dfsg1-2",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.0~git20190204.1.2693389a+dfsg1-2build1",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.0~git20190204.1.2693389a+dfsg1-2build2",
"evidence": "/affected/3/versions"
},
{
"value": "2.1.1+dfsg1-0ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.2",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.3",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.4",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.5",
"evidence": "/affected/3/versions"
},
{
"value": "2.2.0+dfsg1-0ubuntu0.20.04.6",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.2",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.2+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.2+esm2",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.2+esm3",
"evidence": "/affected/3/versions"
},
{
"value": "2.6.1+dfsg1-0ubuntu0.20.04.2+esm4",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "freerdp2",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.3.0+dfsg1-2build1",
"evidence": "/affected/4/versions"
},
{
"value": "2.3.0+dfsg1-2ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "2.3.0+dfsg1-2ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.1+dfsg1-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.1+dfsg1-1ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.1+dfsg1-1ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "2.5.0+dfsg1-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.0+dfsg1-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.1",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.2",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.3",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.4",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.5",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.6",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.7",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.8",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.9",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.10",
"evidence": "/affected/4/versions"
},
{
"value": "2.6.1+dfsg1-3ubuntu2.11",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "freerdp2",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.10.0+dfsg1-1.1ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.2+dfsg1-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.2+dfsg1-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.2+dfsg1-1build3",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.5+dfsg1-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.5+dfsg1-1build2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "freerdp3",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.5.1+dfsg1-0ubuntu1.4",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": [
{
"value": "3.4.0+dfsg1-0ubuntu2",
"evidence": "/affected/6/versions"
},
{
"value": "3.4.0+dfsg1-0ubuntu3",
"evidence": "/affected/6/versions"
},
{
"value": "3.4.0+dfsg1-0ubuntu4",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.0+dfsg1-0ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.1+dfsg1-0ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.1+dfsg1-0ubuntu1.1",
"evidence": "/affected/6/versions"
},
{
"value": "3.5.1+dfsg1-0ubuntu1.2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "freerdp3",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.16.0+dfsg-2ubuntu0.3",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": [
{
"value": "3.14.0+dfsg-1ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "3.15.0+dfsg-2.1",
"evidence": "/affected/7/versions"
},
{
"value": "3.16.0+dfsg-1ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "3.16.0+dfsg-2",
"evidence": "/affected/7/versions"
},
{
"value": "3.16.0+dfsg-2ubuntu0.1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-23884",
"aliases": [
"UBUNTU-CVE-2026-23884"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "freerdp",
"purl": "pkg:deb/ubuntu/freerdp?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1",
"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2",
"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3",
"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23884.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "freerdp-x11",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-cache1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-client1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-codec1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-common1.1.0",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-core1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-crypto1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-gdi1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-locale1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-plugins-standard",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-primitives1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-rail1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
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],
"modified": "2026-10-27T04:17:52.515182725Z",
"provider": "osv",
"upstream": [
"CVE-2026-23884"
],
"references": [
"https://ubuntu.com/security/CVE-2026-23884",
"https://www.cve.org/CVERecord?id=CVE-2026-23884",
"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cfgj-vc84-f3pp",
"https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L114-L122",
"https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/offscreen.c#L87-L91",
"https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0",
"https://ubuntu.com/security/notices/USN-8105-1"
]
},
"related_cves": [
{
"value": "CVE-2026-23884",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/2/score"
},
"source_id": "core-osv",
"document_id": 460318,
"published_at": "2026-01-19T18:16:00+00:00"
}