DEBIAN-CVE-2026-25075
strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.
DEBIAN-CVE-2026-25075
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-2026-25075
strongswan
Source reference: /affected/0/package/name
- Affected versions
- 5.9.8-5
Source reference:
/affected/0/versions5.9.8-5+deb12u1Source reference:
/affected/0/versions5.9.8-5+deb12u2Source reference:
/affected/0/versions - Fixed versions
- 5.9.8-5+deb12u3
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
strongswan
Source reference: /affected/1/package/name
- Affected versions
- 6.0.1-6
Source reference:
/affected/1/versions6.0.1-6+deb13u1Source reference:
/affected/1/versions6.0.1-6+deb13u2Source reference:
/affected/1/versions - Fixed versions
- 6.0.1-6+deb13u4
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
strongswan
Source reference: /affected/2/package/name
- Affected versions
- 6.0.1-6
Source reference:
/affected/2/versions6.0.2-1Source reference:
/affected/2/versions6.0.3-1Source reference:
/affected/2/versions6.0.4-1Source reference:
/affected/2/versions - Fixed versions
- 6.0.5-1
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": "5.9.8-5+deb12u3"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.9.8-5",
"5.9.8-5+deb12u1",
"5.9.8-5+deb12u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25075.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.1-6+deb13u4"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"6.0.1-6",
"6.0.1-6+deb13u1",
"6.0.1-6+deb13u2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25075.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.5-1"
}
]
}
],
"package": {
"name": "strongswan",
"purl": "pkg:deb/debian/strongswan?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"6.0.1-6",
"6.0.2-1",
"6.0.3-1",
"6.0.4-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-25075.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57495 · Revision 1
- Added to Heist Feed
- Publisher date