DEBIAN-CVE-2026-31806
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, the gdi_surface_bits() function processes SURFACE_BITS_COMMAND messages sent by the RDP server. When the command is handled using NSCodec, the bmp.width and bmp.height values provided by the server are not properly validated against the actual desktop dimensions. A malicious RDP server can supply crafted bmp.width and bmp.height values that exceed the expected surface size. Because these values are used during bitmap decoding and memory operations without proper bounds checking, this can lead to a heap buffer overflow. Since the attacker can also control the associated pixel data transmitted by the server, the overflow may be exploitable to overwrite adjacent heap memory. This vulnerability is fixed in 3.24.0.
DEBIAN-CVE-2026-31806
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-31806
freerdp2
Source reference: /affected/0/package/name
- Affected versions
- 2.10.0+dfsg1-1
Source reference:
/affected/0/versions2.10.0+dfsg1-1.1Source reference:
/affected/0/versions2.11.2+dfsg1-1Source reference:
/affected/0/versions2.11.2+dfsg1-1.1~exp1Source reference:
/affected/0/versions2.11.2+dfsg1-1.1~exp2Source reference:
/affected/0/versions2.11.5+dfsg1-1Source reference:
/affected/0/versions2.11.7+dfsg1-1Source reference:
/affected/0/versions2.11.7+dfsg1-2Source reference:
/affected/0/versions2.11.7+dfsg1-3Source reference:
/affected/0/versions2.11.7+dfsg1-4Source reference:
/affected/0/versions2.11.7+dfsg1-5Source reference:
/affected/0/versions2.11.7+dfsg1-6Source reference:
/affected/0/versions2.11.7+dfsg1-6~deb12u1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp3
Source reference: /affected/1/package/name
- Affected versions
- 3.15.0+dfsg-2.1
Source reference:
/affected/1/versions3.15.0+dfsg-2.1+deb13u1Source reference:
/affected/1/versions - Fixed versions
- 3.15.0+dfsg-2.1+deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
freerdp3
Source reference: /affected/2/package/name
- Affected versions
- 3.15.0+dfsg-2.1
Source reference:
/affected/2/versions3.16.0+dfsg-1Source reference:
/affected/2/versions3.16.0+dfsg-2Source reference:
/affected/2/versions3.17.0+dfsg-1Source reference:
/affected/2/versions3.17.1+dfsg-1Source reference:
/affected/2/versions3.17.1+dfsg-2Source reference:
/affected/2/versions3.17.2+dfsg-1Source reference:
/affected/2/versions3.17.2+dfsg-2Source reference:
/affected/2/versions3.17.2+dfsg-3Source reference:
/affected/2/versions3.18.0+dfsg-1Source reference:
/affected/2/versions3.19.0+dfsg-1Source reference:
/affected/2/versions3.19.1+dfsg-1Source reference:
/affected/2/versions3.20.0+dfsg-1Source reference:
/affected/2/versions3.20.2+dfsg-1Source reference:
/affected/2/versions3.21.0+dfsg-1Source reference:
/affected/2/versions3.22.0+dfsg-1Source reference:
/affected/2/versions3.22.0+dfsg-1~bpo13+0Source reference:
/affected/2/versions3.22.0+dfsg-1~bpo13+1Source reference:
/affected/2/versions3.22.0+dfsg-3Source reference:
/affected/2/versions3.23.0+dfsg-1Source reference:
/affected/2/versions3.23.0+dfsg-1~bpo13+1Source reference:
/affected/2/versions - Fixed versions
- 3.24.0+dfsg-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "freerdp2",
"purl": "pkg:deb/debian/freerdp2?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.10.0+dfsg1-1",
"2.10.0+dfsg1-1.1",
"2.11.2+dfsg1-1",
"2.11.2+dfsg1-1.1~exp1",
"2.11.2+dfsg1-1.1~exp2",
"2.11.5+dfsg1-1",
"2.11.7+dfsg1-1",
"2.11.7+dfsg1-2",
"2.11.7+dfsg1-3",
"2.11.7+dfsg1-4",
"2.11.7+dfsg1-5",
"2.11.7+dfsg1-6",
"2.11.7+dfsg1-6~deb12u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31806.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.15.0+dfsg-2.1+deb13u2"
}
]
}
],
"package": {
"name": "freerdp3",
"purl": "pkg:deb/debian/freerdp3?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.15.0+dfsg-2.1",
"3.15.0+dfsg-2.1+deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31806.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.24.0+dfsg-1"
}
]
}
],
"package": {
"name": "freerdp3",
"purl": "pkg:deb/debian/freerdp3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.15.0+dfsg-2.1",
"3.16.0+dfsg-1",
"3.16.0+dfsg-2",
"3.17.0+dfsg-1",
"3.17.1+dfsg-1",
"3.17.1+dfsg-2",
"3.17.2+dfsg-1",
"3.17.2+dfsg-2",
"3.17.2+dfsg-3",
"3.18.0+dfsg-1",
"3.19.0+dfsg-1",
"3.19.1+dfsg-1",
"3.20.0+dfsg-1",
"3.20.2+dfsg-1",
"3.21.0+dfsg-1",
"3.22.0+dfsg-1",
"3.22.0+dfsg-1~bpo13+0",
"3.22.0+dfsg-1~bpo13+1",
"3.22.0+dfsg-3",
"3.23.0+dfsg-1",
"3.23.0+dfsg-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31806.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55921 · Revision 1
- Added to Heist Feed
- Publisher date