UnratedFix available
UBUNTU-CVE-2026-91956
FreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the URBDRC channel's func_get_ep_desc function that indexes interface arrays by position instead of protocol field InterfaceNumber. A malicious RDP server can send a crafted SELECT_CONFIGURATION message with permuted InterfaceNumber values to read past allocated heap memory and crash the client.
Announced Source revision 1
Original source ↗UBUNTU-CVE-2026-91956
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:UBUNTU-CVE-2026-91956
freerdp
Source reference: /affected/0/package/name
- Affected versions
- 1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1
Source reference:
/affected/0/versions1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2Source reference:
/affected/0/versions1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3Source reference:
/affected/0/versions1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp2
Source reference: /affected/1/package/name
- Affected versions
- 2.0.0~git20170725.1.1648deb+dfsg1-1
Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-5Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-6Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-6build1Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-7Source reference:
/affected/1/versions2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1Source reference:
/affected/1/versions2.1.1+dfsg1-0ubuntu0.18.04.1Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.1Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.2Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.3Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm1Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm2Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm3Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm4Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm5Source reference:
/affected/1/versions2.2.0+dfsg1-0ubuntu0.18.04.4+esm6Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp
Source reference: /affected/2/package/name
- Affected versions
- 1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1
Source reference:
/affected/2/versions1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1Source reference:
/affected/2/versions1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp2
Source reference: /affected/3/package/name
- Affected versions
- 2.0.0~git20190204.1.2693389a+dfsg1-1
Source reference:
/affected/3/versions2.0.0~git20190204.1.2693389a+dfsg1-2Source reference:
/affected/3/versions2.0.0~git20190204.1.2693389a+dfsg1-2build1Source reference:
/affected/3/versions2.0.0~git20190204.1.2693389a+dfsg1-2build2Source reference:
/affected/3/versions2.1.1+dfsg1-0ubuntu0.20.04.1Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.1Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.2Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.3Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.4Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.5Source reference:
/affected/3/versions2.2.0+dfsg1-0ubuntu0.20.04.6Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.1Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.2Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.2+esm1Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.2+esm2Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.2+esm3Source reference:
/affected/3/versions2.6.1+dfsg1-0ubuntu0.20.04.2+esm4Source reference:
/affected/3/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp2
Source reference: /affected/4/package/name
- Affected versions
- 2.3.0+dfsg1-2build1
Source reference:
/affected/4/versions2.3.0+dfsg1-2ubuntu1Source reference:
/affected/4/versions2.3.0+dfsg1-2ubuntu2Source reference:
/affected/4/versions2.4.1+dfsg1-1Source reference:
/affected/4/versions2.4.1+dfsg1-1ubuntu1Source reference:
/affected/4/versions2.4.1+dfsg1-1ubuntu2Source reference:
/affected/4/versions2.5.0+dfsg1-1Source reference:
/affected/4/versions2.6.0+dfsg1-1Source reference:
/affected/4/versions2.6.1+dfsg1-1Source reference:
/affected/4/versions2.6.1+dfsg1-3Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu1Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.1Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.2Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.3Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.4Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.5Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.6Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.7Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.8Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.9Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.10Source reference:
/affected/4/versions2.6.1+dfsg1-3ubuntu2.11Source reference:
/affected/4/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp3
Source reference: /affected/5/package/name
- Affected versions
- 3.4.0+dfsg1-0ubuntu2
Source reference:
/affected/5/versions3.4.0+dfsg1-0ubuntu3Source reference:
/affected/5/versions3.4.0+dfsg1-0ubuntu4Source reference:
/affected/5/versions3.5.0+dfsg1-0ubuntu1Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1.1Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1.2Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1.4Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1.5Source reference:
/affected/5/versions3.5.1+dfsg1-0ubuntu1.6Source reference:
/affected/5/versions3.30.0+dfsg-0ubuntu0.24.04.1Source reference:
/affected/5/versions3.30.0+dfsg-0ubuntu0.24.04.2Source reference:
/affected/5/versions - Fixed versions
- 3.31.0+dfsg-0ubuntu0.24.04.1
Source reference:
/affected/5/ranges - Prerequisites
- Not stated in this record
freerdp2
Source reference: /affected/6/package/name
- Affected versions
- 2.10.0+dfsg1-1.1ubuntu1
Source reference:
/affected/6/versions2.11.2+dfsg1-1Source reference:
/affected/6/versions2.11.2+dfsg1-1build1Source reference:
/affected/6/versions2.11.2+dfsg1-1build3Source reference:
/affected/6/versions2.11.5+dfsg1-1build1Source reference:
/affected/6/versions2.11.5+dfsg1-1build2Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm1Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm2Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm3Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm4Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm5Source reference:
/affected/6/versions2.11.5+dfsg1-1ubuntu0.1~esm6Source reference:
/affected/6/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
freerdp3
Source reference: /affected/7/package/name
- Affected versions
- 3.16.0+dfsg-2
Source reference:
/affected/7/versions3.18.0+dfsg-1ubuntu1Source reference:
/affected/7/versions3.19.0+dfsg-1Source reference:
/affected/7/versions3.19.1+dfsg-1Source reference:
/affected/7/versions3.20.0+dfsg-1Source reference:
/affected/7/versions3.20.2+dfsg-1Source reference:
/affected/7/versions3.21.0+dfsg-1Source reference:
/affected/7/versions3.22.0+dfsg-1Source reference:
/affected/7/versions3.24.1+dfsg-1ubuntu1Source reference:
/affected/7/versions3.24.2+dfsg-1ubuntu1Source reference:
/affected/7/versions3.24.2+dfsg-1ubuntu1.1Source reference:
/affected/7/versions3.30.0+dfsg-0ubuntu0.26.04.1Source reference:
/affected/7/versions3.30.0+dfsg-0ubuntu0.26.04.2Source reference:
/affected/7/versions - Fixed versions
- 3.31.0+dfsg-0ubuntu0.26.04.1
Source reference:
/affected/7/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
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"ranges": [
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"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-2026-91956.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"
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"binary_name": "libfreerdp-client1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
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{
"binary_name": "libfreerdp-codec1.1",
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"binary_name": "libfreerdp-core1.1",
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},
{
"binary_name": "libfreerdp-crypto1.1",
"binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
},
{
"binary_name": "libfreerdp-gdi1.1",
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{
"binary_name": "libfreerdp-locale1.1",
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},
{
"binary_name": "libfreerdp-plugins-standard",
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},
{
"binary_name": "libwinpr-asn1-0.1",
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},
{
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},
{
"binary_name": "libwinpr-dsparse0.1",
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{
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},
"ecosystem_specific": {
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},
{
"binary_name": "libuwac0-0",
"binary_version": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"
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{
"binary_name": "libwinpr-tools2-2",
"binary_version": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"
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{
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"binary_version": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"
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{
"ranges": [
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"3.30.0+dfsg-0ubuntu0.26.04.1",
"3.30.0+dfsg-0ubuntu0.26.04.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-91956.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "freerdp-proxy",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp-proxy-modules",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp-sdl",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp-shadow-x11",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp-wayland",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp-x11",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-proxy",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-proxy-modules",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-sdl",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-shadow-x11",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-wayland",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "freerdp3-x11",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp-client3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp-server-proxy3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp-server3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp-shadow-subsystem3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp-shadow3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libfreerdp3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libwinpr-tools3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "libwinpr3-3",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "winpr-utils",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
},
{
"binary_name": "winpr3-utils",
"binary_version": "3.31.0+dfsg-0ubuntu0.26.04.1"
}
],
"availability": "No subscription required"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #5836 · Revision 1
- Added to Heist Feed
- Publisher date