DEBIAN-CVE-2026-11771
OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
DEBIAN-CVE-2026-11771
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-2026-11771
openvpn
Source reference: /affected/0/package/name
- Affected versions
- 2.6.11-1
Source reference:
/affected/0/versions2.6.12-1Source reference:
/affected/0/versions2.6.13-1Source reference:
/affected/0/versions2.6.14-0+deb12u1Source reference:
/affected/0/versions2.6.3-1Source reference:
/affected/0/versions2.6.3-1+deb12u1Source reference:
/affected/0/versions2.6.3-1+deb12u1~bpo11+1Source reference:
/affected/0/versions2.6.3-1+deb12u2Source reference:
/affected/0/versions2.6.3-1+deb12u2~bpo11+1Source reference:
/affected/0/versions2.6.3-1+deb12u3Source reference:
/affected/0/versions2.6.3-1+deb12u4Source reference:
/affected/0/versions2.6.3-2Source reference:
/affected/0/versions2.6.3-2.1Source reference:
/affected/0/versions2.6.7-1Source reference:
/affected/0/versions2.6.9-1Source reference:
/affected/0/versions - Fixed versions
- 2.6.14-0+deb12u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
openvpn
Source reference: /affected/1/package/name
- Affected versions
- 2.6.14-1
Source reference:
/affected/1/versions2.6.14-1+deb13u1Source reference:
/affected/1/versions2.6.14-1+deb13u2Source reference:
/affected/1/versions - Fixed versions
- 2.6.14-1+deb13u3
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
openvpn
Source reference: /affected/2/package/name
- Affected versions
- 2.6.14-1
Source reference:
/affected/2/versions2.6.14-2Source reference:
/affected/2/versions2.6.15-1Source reference:
/affected/2/versions2.7.0-1Source reference:
/affected/2/versions2.7.0-1~bpo13+1Source reference:
/affected/2/versions2.7.0~alpha1-1Source reference:
/affected/2/versions2.7.0~alpha2-1Source reference:
/affected/2/versions2.7.0~alpha3-1Source reference:
/affected/2/versions2.7.0~beta1-1Source reference:
/affected/2/versions2.7.0~beta2-1Source reference:
/affected/2/versions2.7.0~beta3-1Source reference:
/affected/2/versions2.7.0~rc1-1Source reference:
/affected/2/versions2.7.0~rc2-1Source reference:
/affected/2/versions2.7.0~rc2-2Source reference:
/affected/2/versions2.7.0~rc3-1Source reference:
/affected/2/versions2.7.0~rc4-1Source reference:
/affected/2/versions2.7.0~rc5-1Source reference:
/affected/2/versions2.7.0~rc6-1Source reference:
/affected/2/versions2.7.1-1Source reference:
/affected/2/versions2.7.1-1~bpo13+1Source reference:
/affected/2/versions2.7.2-1Source reference:
/affected/2/versions2.7.2-1~bpo13+1Source reference:
/affected/2/versions2.7.3-1Source reference:
/affected/2/versions2.7.5-1~bpo13+1Source reference:
/affected/2/versions - Fixed versions
- 2.7.5-1
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"
},
{
"fixed": "2.6.14-0+deb12u2"
}
]
}
],
"package": {
"name": "openvpn",
"purl": "pkg:deb/debian/openvpn?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.6.11-1",
"2.6.12-1",
"2.6.13-1",
"2.6.14-0+deb12u1",
"2.6.3-1",
"2.6.3-1+deb12u1",
"2.6.3-1+deb12u1~bpo11+1",
"2.6.3-1+deb12u2",
"2.6.3-1+deb12u2~bpo11+1",
"2.6.3-1+deb12u3",
"2.6.3-1+deb12u4",
"2.6.3-2",
"2.6.3-2.1",
"2.6.7-1",
"2.6.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11771.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.14-1+deb13u3"
}
]
}
],
"package": {
"name": "openvpn",
"purl": "pkg:deb/debian/openvpn?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.6.14-1",
"2.6.14-1+deb13u1",
"2.6.14-1+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11771.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.5-1"
}
]
}
],
"package": {
"name": "openvpn",
"purl": "pkg:deb/debian/openvpn?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.6.14-1",
"2.6.14-2",
"2.6.15-1",
"2.7.0-1",
"2.7.0-1~bpo13+1",
"2.7.0~alpha1-1",
"2.7.0~alpha2-1",
"2.7.0~alpha3-1",
"2.7.0~beta1-1",
"2.7.0~beta2-1",
"2.7.0~beta3-1",
"2.7.0~rc1-1",
"2.7.0~rc2-1",
"2.7.0~rc2-2",
"2.7.0~rc3-1",
"2.7.0~rc4-1",
"2.7.0~rc5-1",
"2.7.0~rc6-1",
"2.7.1-1",
"2.7.1-1~bpo13+1",
"2.7.2-1",
"2.7.2-1~bpo13+1",
"2.7.3-1",
"2.7.5-1~bpo13+1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11771.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55460 · Revision 1
- Added to Heist Feed
- Publisher date