ALPINE-CVE-2026-42766
Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without first checking whether it was present. An attacker who supplies such a CMS message to an application performing password-based CMS decryption can trigger an application crash, leading to a Denial of Service. Applications that process password-encrypted CMS messages may be affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
ALPINE-CVE-2026-42766
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:ALPINE-CVE-2026-42766
openssl
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.3.7-r1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.7-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.7-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/3/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 3.5.7-r0
Source reference:
/affected/3/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": "1.0.2"
},
{
"fixed": "3.3.7-r1"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.21"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42766.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2"
},
{
"fixed": "3.5.7-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42766.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2"
},
{
"fixed": "3.5.7-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42766.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "1.0.2"
},
{
"fixed": "3.5.7-r0"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:apk/alpine/openssl?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42766.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54393 · Revision 1
- Added to Heist Feed
- Publisher date