DEBIAN-CVE-2026-40253
openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. In versions 3.26.0 and below, the BER/DER decoding functions in the shared common library (asn1.c) accept a raw pointer but no buffer length parameter, and trust attacker-controlled BER length fields without validating them against actual buffer boundaries. All primitive decoders are affected: ber_decode_INTEGER, ber_decode_SEQUENCE, ber_decode_OCTET_STRING, ber_decode_BIT_STRING, and ber_decode_CHOICE. Additionally, ber_decode_INTEGER can produce integer underflows when the encoded length is zero. An attacker supplying a malformed BER-encoded cryptographic object through PKCS#11 operations such as C_CreateObject or C_UnwrapKey, token loading from disk, or remote backend communication can trigger out-of-bounds reads. This affects all token backends (Soft, ICA, CCA, TPM, EP11, ICSF) since the vulnerable code is in the shared common library. A patch is available thorugh commit ed378f463ef73364c89feb0fc923f4dc867332a3.
DEBIAN-CVE-2026-40253
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-2026-40253
opencryptoki
Source reference: /affected/0/package/name
- Affected versions
- 3.23.0+dfsg-0.1
Source reference:
/affected/0/versions3.23.0+dfsg-0.2Source reference:
/affected/0/versions3.23.0+dfsg-0.3Source reference:
/affected/0/versions3.23.0+dfsg-0.4Source reference:
/affected/0/versions3.27.0-1Source reference:
/affected/0/versions3.8.1+dfsg-3.2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
opencryptoki
Source reference: /affected/1/package/name
- Affected versions
- 3.23.0+dfsg-0.3
Source reference:
/affected/1/versions - Fixed versions
- 3.23.0+dfsg-0.3+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
opencryptoki
Source reference: /affected/2/package/name
- Affected versions
- 3.23.0+dfsg-0.3
Source reference:
/affected/2/versions3.23.0+dfsg-0.4Source reference:
/affected/2/versions - Fixed versions
- 3.27.0-1
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": "opencryptoki",
"purl": "pkg:deb/debian/opencryptoki?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.23.0+dfsg-0.1",
"3.23.0+dfsg-0.2",
"3.23.0+dfsg-0.3",
"3.23.0+dfsg-0.4",
"3.27.0-1",
"3.8.1+dfsg-3.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40253.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.23.0+dfsg-0.3+deb13u1"
}
]
}
],
"package": {
"name": "opencryptoki",
"purl": "pkg:deb/debian/opencryptoki?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.23.0+dfsg-0.3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40253.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.27.0-1"
}
]
}
],
"package": {
"name": "opencryptoki",
"purl": "pkg:deb/debian/opencryptoki?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.23.0+dfsg-0.3",
"3.23.0+dfsg-0.4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40253.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56425 · Revision 1
- Added to Heist Feed
- Publisher date