MediumFix available
edk2, edk2-hwe and 3 more products — security advisory
Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF 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.
- Products
- edk2, edk2-hwe, nodejs, openssl, openssl-fips
- Affected versions
- 1.1.1l-1ubuntu1, 12.22.5~dfsg-5ubuntu1, 12.22.7~dfsg-2ubuntu1, 12.22.7~dfsg-2ubuntu3, 12.22.9~dfsg-1ubuntu2, 12.22.9~dfsg-1ubuntu3, 12.22.9~dfsg-1ubuntu3.1, 12.22.9~dfsg-1ubuntu3.2, 12.22.9~dfsg-1ubuntu3.3, 12.22.9~dfsg-1ubuntu3.4, 12.22.9~dfsg-1ubuntu3.5, 12.22.9~dfsg-1ubuntu3.6, 12.22.9~dfsg-1ubuntu3.6+esm2, 2023.05-2, 2023.11-2, 2023.11-3, 2023.11-4, 2023.11-5, 2023.11-6, 2023.11-8, 2024.02-1, 2024.02-2, 2024.02-2ubuntu0.1, 2024.02-2ubuntu0.10, 2024.02-2ubuntu0.3, 2024.02-2ubuntu0.4, 2024.02-2ubuntu0.5, 2024.02-2ubuntu0.6, 2024.02-2ubuntu0.7, 2024.02-2ubuntu0.8, 2024.02-2ubuntu0.9, 2025.02-3ubuntu2, 2025.02-8, 2025.02-8ubuntu1, 2025.02-8ubuntu2, 2025.02-8ubuntu3, 2025.02-8ubuntu3.1, 2025.02-8ubuntu3.2, 2025.11-3ubuntu6, 2025.11-3ubuntu7, 2025.11-3ubuntu7.2, 2025.11-3ubuntu7.3, 2025.11-3ubuntu8, 2025.11-3ubuntu8.2, 2025.11-3ubuntu9, 2026.05-2ubuntu1, 2026.05-2ubuntu2, 2026.05-2ubuntu3, 3.0.0-1ubuntu1, 3.0.1-0ubuntu1, 3.0.10-1ubuntu2, 3.0.10-1ubuntu2.1, 3.0.10-1ubuntu3, 3.0.10-1ubuntu4, 3.0.13-0ubuntu2, 3.0.13-0ubuntu3, 3.0.13-0ubuntu3+Fips1, 3.0.13-0ubuntu3.1, 3.0.13-0ubuntu3.2, 3.0.13-0ubuntu3.3, 3.0.13-0ubuntu3.4, 3.0.13-0ubuntu3.5, 3.0.13-0ubuntu3.6, 3.0.13-0ubuntu3.6+Fips1, 3.0.13-0ubuntu3.7, 3.0.13-0ubuntu3.9, 3.0.2-0ubuntu1, 3.0.2-0ubuntu1.1, 3.0.2-0ubuntu1.10, 3.0.2-0ubuntu1.10+Fips1, 3.0.2-0ubuntu1.12, 3.0.2-0ubuntu1.12+Fips1, 3.0.2-0ubuntu1.13, 3.0.2-0ubuntu1.14, 3.0.2-0ubuntu1.14+Fips1, 3.0.2-0ubuntu1.15, 3.0.2-0ubuntu1.15+Fips1, 3.0.2-0ubuntu1.16, 3.0.2-0ubuntu1.16+Fips1, 3.0.2-0ubuntu1.17, 3.0.2-0ubuntu1.17+Fips1, 3.0.2-0ubuntu1.18, 3.0.2-0ubuntu1.18+Fips1, 3.0.2-0ubuntu1.19, 3.0.2-0ubuntu1.19+Fips1, 3.0.2-0ubuntu1.2, 3.0.2-0ubuntu1.20, 3.0.2-0ubuntu1.20+Fips1, 3.0.2-0ubuntu1.21, 3.0.2-0ubuntu1.21+Fips1, 3.0.2-0ubuntu1.23, 3.0.2-0ubuntu1.23+Fips1, 3.0.2-0ubuntu1.4, 3.0.2-0ubuntu1.5, 3.0.2-0ubuntu1.6, 3.0.2-0ubuntu1.7, 3.0.2-0ubuntu1.8, 3.0.2-0ubuntu1.9, 3.0.5-0ubuntu0.1+Fips2.1, 3.0.5-0ubuntu0.2+Fips1, 3.4.1-1ubuntu3, 3.5.0-2ubuntu1, 3.5.2-1ubuntu1, 3.5.3-1ubuntu2, 3.5.3-1ubuntu3, 3.5.3-1ubuntu3.3, 3.5.5-1ubuntu1, 3.5.5-1ubuntu3
- Fixed versions
- 3.0.13-0ubuntu3.11, 3.0.13-0ubuntu3.12+Fips1, 3.0.2-0ubuntu1.25, 3.0.2-0ubuntu1.25+Fips1, 3.5.3-1ubuntu3.4, 3.5.5-1ubuntu3.2
- CVEs
- CVE-2026-42767
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:12 UTC · Revision 1
Source evidence
Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF 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.
osv:UBUNTU-CVE-2026-42767
openssl
Fixed versions: 3.0.2-0ubuntu1.25
nodejs
Fixed versions: Not specified
openssl
Fixed versions: Not specified
openssl-fips
Fixed versions: Not specified
openssl
Fixed versions: 3.0.2-0ubuntu1.25+Fips1
openssl-fips
Fixed versions: Not specified
edk2
Fixed versions: Not specified
openssl
Fixed versions: 3.0.13-0ubuntu3.11
openssl-fips
Fixed versions: 3.0.13-0ubuntu3.12+Fips1
edk2
Fixed versions: Not specified
openssl
Fixed versions: 3.5.3-1ubuntu3.4
edk2
Fixed versions: Not specified
edk2-hwe
Fixed versions: Not specified
edk2
Fixed versions: Not specified
edk2-hwe
Fixed versions: Not specified
openssl
Fixed versions: 3.5.5-1ubuntu3.2
Complete source record
{
"id": "6ef1c93a30da316545d48b947482b19f8d786ec1cdb677fb050e783e48fbb478",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-42767",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-42767",
"summary": "Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF 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.",
"evidence": "osv:UBUNTU-CVE-2026-42767",
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{
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{
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"evidence": "/affected/1/versions"
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{
"value": "12.22.9~dfsg-1ubuntu2",
"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
},
{
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"evidence": "/affected/1/versions"
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{
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{
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{
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{
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{
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{
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]
},
{
"name": {
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"evidence": "/affected/3/package/name"
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{
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"evidence": "/affected/4/package/name"
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}
],
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{
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{
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"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
},
{
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{
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{
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{
"name": {
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"evidence": "/affected/5/package/name"
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{
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{
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}
]
},
{
"name": {
"value": "edk2",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2023.05-2",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-2",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-3",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-4",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-5",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-6",
"evidence": "/affected/6/versions"
},
{
"value": "2023.11-8",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-1",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2ubuntu0.1",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2ubuntu0.3",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2ubuntu0.4",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2ubuntu0.5",
"evidence": "/affected/6/versions"
},
{
"value": "2024.02-2ubuntu0.6",
"evidence": "/affected/6/versions"
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{
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{
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{
"value": "2024.02-2ubuntu0.9",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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},
{
"name": {
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"prerequisites": [],
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"affected_versions": [
{
"value": "2025.02-3ubuntu2",
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},
{
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},
{
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{
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{
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{
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{
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],
"affected_versions": [
{
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},
{
"value": "3.5.0-2ubuntu1",
"evidence": "/affected/10/versions"
},
{
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"evidence": "/affected/10/versions"
},
{
"value": "3.5.3-1ubuntu2",
"evidence": "/affected/10/versions"
},
{
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},
{
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}
]
},
{
"name": {
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"evidence": "/affected/11/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "2025.11-3ubuntu7",
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},
{
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{
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},
{
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"evidence": "/affected/11/versions"
},
{
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}
]
},
{
"name": {
"value": "edk2-hwe",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.11-3ubuntu8",
"evidence": "/affected/12/versions"
},
{
"value": "2025.11-3ubuntu9",
"evidence": "/affected/12/versions"
},
{
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"evidence": "/affected/12/versions"
},
{
"value": "2026.05-2ubuntu2",
"evidence": "/affected/12/versions"
},
{
"value": "2026.05-2ubuntu3",
"evidence": "/affected/12/versions"
}
]
},
{
"name": {
"value": "edk2",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.02-8ubuntu3",
"evidence": "/affected/13/versions"
},
{
"value": "2025.11-3ubuntu6",
"evidence": "/affected/13/versions"
},
{
"value": "2025.11-3ubuntu7",
"evidence": "/affected/13/versions"
},
{
"value": "2025.11-3ubuntu7.2",
"evidence": "/affected/13/versions"
},
{
"value": "2025.11-3ubuntu7.3",
"evidence": "/affected/13/versions"
}
]
},
{
"name": {
"value": "edk2-hwe",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.11-3ubuntu6",
"evidence": "/affected/14/versions"
},
{
"value": "2025.11-3ubuntu8",
"evidence": "/affected/14/versions"
},
{
"value": "2025.11-3ubuntu8.2",
"evidence": "/affected/14/versions"
}
]
},
{
"name": {
"value": "openssl",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.5.5-1ubuntu3.2",
"evidence": "/affected/15/ranges"
}
],
"affected_versions": [
{
"value": "3.5.3-1ubuntu2",
"evidence": "/affected/15/versions"
},
{
"value": "3.5.5-1ubuntu1",
"evidence": "/affected/15/versions"
},
{
"value": "3.5.5-1ubuntu3",
"evidence": "/affected/15/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-42767",
"aliases": [
"UBUNTU-CVE-2026-42767"
],
"metrics": [
{
"type": "CVSS_V3",
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{
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],
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],
"modified": "2026-10-17T12:58:16.259784617Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-42767",
"https://www.cve.org/CVERecord?id=CVE-2026-42767",
"https://openssl-library.org/news/secadv/20260609.txt",
"https://ubuntu.com/security/notices/USN-8414-1"
]
},
"related_cves": [
{
"value": "CVE-2026-42767",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358487,
"published_at": "2026-06-09T00:00:00+00:00"
}