DEBIAN-CVE-2026-33977
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.
DEBIAN-CVE-2026-33977
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-2026-33977
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/versions3.24.0+dfsg-1Source reference:
/affected/2/versions3.24.0+dfsg-2Source reference:
/affected/2/versions3.24.1+dfsg-1Source reference:
/affected/2/versions3.24.2+dfsg-1~bpo13+1Source reference:
/affected/2/versions - Fixed versions
- 3.24.2+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-2026-33977.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-2026-33977.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.24.2+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",
"3.24.0+dfsg-1",
"3.24.0+dfsg-2",
"3.24.1+dfsg-1",
"3.24.2+dfsg-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33977.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56809 · Revision 1
- Added to Heist Feed
- Publisher date