DEBIAN-CVE-2026-2645
In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 (wolfSSL 5.8.2 and earlier is vulnerable, 5.8.4 is not vulnerable). In 5.8.4 wolfSSL would detect the issue later in the handshake. 5.9.0 was further hardened to catch the issue earlier in the handshake.
DEBIAN-CVE-2026-2645
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-2026-2645
wolfssl
Source reference: /affected/0/package/name
- Affected versions
- 5.5.4-2
Source reference:
/affected/0/versions5.5.4-2+deb12u1Source reference:
/affected/0/versions5.5.4-2+deb12u2Source reference:
/affected/0/versions5.5.4-2+deb12u3Source reference:
/affected/0/versions5.5.4-2.1Source reference:
/affected/0/versions5.6.4-1Source reference:
/affected/0/versions5.6.4-2Source reference:
/affected/0/versions5.6.6-1Source reference:
/affected/0/versions5.6.6-1.1Source reference:
/affected/0/versions5.6.6-1.2Source reference:
/affected/0/versions5.6.6-1.3Source reference:
/affected/0/versions5.6.6-1.3~exp1Source reference:
/affected/0/versions5.7.0-0.1Source reference:
/affected/0/versions5.7.0-0.2Source reference:
/affected/0/versions5.7.0-0.3Source reference:
/affected/0/versions5.7.2-0.1Source reference:
/affected/0/versions5.7.2-0.2Source reference:
/affected/0/versions5.7.2-0.3Source reference:
/affected/0/versions5.7.2-0.4Source reference:
/affected/0/versions5.8.2-1Source reference:
/affected/0/versions5.8.2-1.1Source reference:
/affected/0/versions5.8.2-1.2Source reference:
/affected/0/versions5.8.4-1Source reference:
/affected/0/versions5.9.0-0.1Source reference:
/affected/0/versions5.9.0-0.2Source reference:
/affected/0/versions5.9.1-0.1Source reference:
/affected/0/versions5.9.2-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
wolfssl
Source reference: /affected/1/package/name
- Affected versions
- 5.7.2-0.1
Source reference:
/affected/1/versions5.7.2-0.1+deb13u1Source reference:
/affected/1/versions5.7.2-0.1+deb13u2Source reference:
/affected/1/versions5.7.2-0.2Source reference:
/affected/1/versions5.7.2-0.3Source reference:
/affected/1/versions5.7.2-0.4Source reference:
/affected/1/versions5.8.2-1Source reference:
/affected/1/versions5.8.2-1.1Source reference:
/affected/1/versions5.8.2-1.2Source reference:
/affected/1/versions5.8.4-1Source reference:
/affected/1/versions5.9.0-0.1Source reference:
/affected/1/versions5.9.0-0.2Source reference:
/affected/1/versions5.9.1-0.1Source reference:
/affected/1/versions5.9.2-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- 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": "wolfssl",
"purl": "pkg:deb/debian/wolfssl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"5.5.4-2",
"5.5.4-2+deb12u1",
"5.5.4-2+deb12u2",
"5.5.4-2+deb12u3",
"5.5.4-2.1",
"5.6.4-1",
"5.6.4-2",
"5.6.6-1",
"5.6.6-1.1",
"5.6.6-1.2",
"5.6.6-1.3",
"5.6.6-1.3~exp1",
"5.7.0-0.1",
"5.7.0-0.2",
"5.7.0-0.3",
"5.7.2-0.1",
"5.7.2-0.2",
"5.7.2-0.3",
"5.7.2-0.4",
"5.8.2-1",
"5.8.2-1.1",
"5.8.2-1.2",
"5.8.4-1",
"5.9.0-0.1",
"5.9.0-0.2",
"5.9.1-0.1",
"5.9.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2645.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "wolfssl",
"purl": "pkg:deb/debian/wolfssl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"5.7.2-0.1",
"5.7.2-0.1+deb13u1",
"5.7.2-0.1+deb13u2",
"5.7.2-0.2",
"5.7.2-0.3",
"5.7.2-0.4",
"5.8.2-1",
"5.8.2-1.1",
"5.8.2-1.2",
"5.8.4-1",
"5.9.0-0.1",
"5.9.0-0.2",
"5.9.1-0.1",
"5.9.2-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-2645.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56666 · Revision 1
- Added to Heist Feed
- Publisher date