DEBIAN-CVE-2026-12413
An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof < elemsof(md->digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2 connections that do not set fragmentation=no are vulnerable. IKEv1 is not affected.
DEBIAN-CVE-2026-12413
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-2026-12413
libreswan
Source reference: /affected/0/package/name
- Affected versions
- 4.10-2
Source reference:
/affected/0/versions4.10-2+deb12u1Source reference:
/affected/0/versions4.11-1Source reference:
/affected/0/versions4.12-1Source reference:
/affected/0/versions4.12-2Source reference:
/affected/0/versions4.12-3Source reference:
/affected/0/versions4.14-1Source reference:
/affected/0/versions4.14-1.1Source reference:
/affected/0/versions4.15-1Source reference:
/affected/0/versions5.0~rc2-1Source reference:
/affected/0/versions5.0~rc2-2Source reference:
/affected/0/versions5.2-1Source reference:
/affected/0/versions5.2-2Source reference:
/affected/0/versions5.2-2.1Source reference:
/affected/0/versions5.2-2.2Source reference:
/affected/0/versions5.2-2.3Source reference:
/affected/0/versions5.2-2.4Source reference:
/affected/0/versions5.2-2.5Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libreswan
Source reference: /affected/1/package/name
- Affected versions
- 5.2-2.2
Source reference:
/affected/1/versions5.2-2.3Source reference:
/affected/1/versions5.2-2.4Source reference:
/affected/1/versions5.2-2.5Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
libreswan
Source reference: /affected/2/package/name
- Affected versions
- 5.2-2.2
Source reference:
/affected/2/versions5.2-2.3Source reference:
/affected/2/versions5.2-2.4Source reference:
/affected/2/versions - Fixed versions
- 5.2-2.5
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": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.10-2",
"4.10-2+deb12u1",
"4.11-1",
"4.12-1",
"4.12-2",
"4.12-3",
"4.14-1",
"4.14-1.1",
"4.15-1",
"5.0~rc2-1",
"5.0~rc2-2",
"5.2-1",
"5.2-2",
"5.2-2.1",
"5.2-2.2",
"5.2-2.3",
"5.2-2.4",
"5.2-2.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12413.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.2-2.2",
"5.2-2.3",
"5.2-2.4",
"5.2-2.5"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12413.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "5.2-2.5"
}
]
}
],
"package": {
"name": "libreswan",
"purl": "pkg:deb/debian/libreswan?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"5.2-2.2",
"5.2-2.3",
"5.2-2.4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12413.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55490 · Revision 1
- Added to Heist Feed
- Publisher date