HighFix available
edk2, edk2-hwe and 3 more products — security advisory
Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer. Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service. CWE: CWE-476: NULL Pointer Dereference Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted. This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no
- Products
- edk2, edk2-hwe, nodejs, openssl, openssl-fips
- Affected versions
- 0.10.25~dfsg2-2ubuntu1, 1.1.1l-1ubuntu1, 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, 2024.02-2ubuntu0.3, 2024.02-2ubuntu0.4, 2024.02-2ubuntu0.5, 2024.02-2ubuntu0.6, 2024.02-2ubuntu0.7, 2024.02-2ubuntu0.8, 2024.02-2ubuntu0.9, 2025.02-8ubuntu3, 2025.11-3ubuntu6, 2025.11-3ubuntu7, 2025.11-3ubuntu7.2, 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, 3.0.13-0ubuntu3.11, 3.0.13-0ubuntu3.12, 3.0.13-0ubuntu3.12+Fips1, 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, 3.0.2-0ubuntu1.25, 3.0.2-0ubuntu1.25+Fips1, 3.0.2-0ubuntu1.26, 3.0.2-0ubuntu1.26+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, 3.5.3-1ubuntu2, 3.5.5-1ubuntu1, 3.5.5-1ubuntu3, 3.5.5-1ubuntu3.2, 3.5.5-1ubuntu3.3, 4.2.2~dfsg-1, 4.2.3~dfsg-1, 4.2.4~dfsg-1ubuntu1, 4.2.4~dfsg-2, 4.2.6~dfsg-1ubuntu1, 4.2.6~dfsg-1ubuntu4, 4.2.6~dfsg-1ubuntu4.1, 4.2.6~dfsg-1ubuntu4.2, 4.2.6~dfsg-1ubuntu4.2+esm1, 4.2.6~dfsg-1ubuntu4.2+esm2, 4.2.6~dfsg-1ubuntu4.2+esm3, 6.11.4~dfsg-1ubuntu1, 6.11.4~dfsg-1ubuntu2, 6.12.0~dfsg-1ubuntu1, 6.12.0~dfsg-2ubuntu1, 6.12.0~dfsg-2ubuntu2, 8.10.0~dfsg-2, 8.10.0~dfsg-2ubuntu0.2, 8.10.0~dfsg-2ubuntu0.3, 8.10.0~dfsg-2ubuntu0.4, 8.10.0~dfsg-2ubuntu0.4+esm1, 8.10.0~dfsg-2ubuntu0.4+esm2, 8.10.0~dfsg-2ubuntu0.4+esm3, 8.10.0~dfsg-2ubuntu0.4+esm4, 8.10.0~dfsg-2ubuntu0.4+esm5, 8.10.0~dfsg-2ubuntu0.4+esm6
- Fixed versions
- 2024.02-2ubuntu0.10, 2025.11-3ubuntu7.3, 3.0.13-0ubuntu3.15, 3.0.13-0ubuntu3.15+Fips1, 3.0.2-0ubuntu1.29, 3.0.2-0ubuntu1.29+Fips1, 3.5.5-1ubuntu3.4
- CVEs
- CVE-2026-63076
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:11 UTC · Revision 1
Source evidence
Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer. Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service. CWE: CWE-476: NULL Pointer Dereference Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted. This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no
osv:UBUNTU-CVE-2026-63076
nodejs
Fixed versions: Not specified
nodejs
Fixed versions: Not specified
openssl
Fixed versions: 3.0.2-0ubuntu1.29
openssl
Fixed versions: Not specified
openssl-fips
Fixed versions: Not specified
openssl
Fixed versions: 3.0.2-0ubuntu1.29+Fips1
openssl-fips
Fixed versions: Not specified
edk2
Fixed versions: 2024.02-2ubuntu0.10
openssl
Fixed versions: 3.0.13-0ubuntu3.15
openssl-fips
Fixed versions: 3.0.13-0ubuntu3.15+Fips1
edk2
Fixed versions: Not specified
edk2-hwe
Fixed versions: Not specified
edk2
Fixed versions: 2025.11-3ubuntu7.3
edk2-hwe
Fixed versions: Not specified
openssl
Fixed versions: 3.5.5-1ubuntu3.4
Complete source record
{
"id": "7a31df2bd39daf4a48c7c435d18b680696e321f77c0e0b3578d177670216bc3a",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-63076",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-63076",
"summary": "Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer. Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service. CWE: CWE-476: NULL Pointer Dereference Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted. This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no ",
"evidence": "osv:UBUNTU-CVE-2026-63076",
"products": [
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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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"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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{
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{
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{
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{
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{
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
},
{
"value": "3.0.2-0ubuntu1.12",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/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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{
"value": "3.0.2-0ubuntu1.20",
"evidence": "/affected/2/versions"
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{
"value": "3.0.2-0ubuntu1.21",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.2-0ubuntu1.23",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.2-0ubuntu1.25",
"evidence": "/affected/2/versions"
},
{
"value": "3.0.2-0ubuntu1.26",
"evidence": "/affected/2/versions"
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"evidence": "/affected/3/package/name"
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{
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"evidence": "/affected/3/versions"
},
{
"value": "3.0.2-0ubuntu1.12+Fips1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "openssl-fips",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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{
"name": {
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{
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{
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{
"value": "3.0.2-0ubuntu1.14+Fips1",
"evidence": "/affected/5/versions"
},
{
"value": "3.0.2-0ubuntu1.15+Fips1",
"evidence": "/affected/5/versions"
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{
"value": "3.0.2-0ubuntu1.16+Fips1",
"evidence": "/affected/5/versions"
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{
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"evidence": "/affected/5/versions"
},
{
"value": "3.0.2-0ubuntu1.18+Fips1",
"evidence": "/affected/5/versions"
},
{
"value": "3.0.2-0ubuntu1.19+Fips1",
"evidence": "/affected/5/versions"
},
{
"value": "3.0.2-0ubuntu1.20+Fips1",
"evidence": "/affected/5/versions"
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{
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"evidence": "/affected/5/versions"
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{
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{
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},
{
"name": {
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},
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{
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],
"affected_versions": [
{
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},
{
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/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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{
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{
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{
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{
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{
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"evidence": "/affected/7/versions"
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{
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{
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},
{
"name": {
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{
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],
"affected_versions": [
{
"value": "3.0.10-1ubuntu2",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.10-1ubuntu2.1",
"evidence": "/affected/8/versions"
},
{
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},
{
"value": "3.0.10-1ubuntu4",
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},
{
"value": "3.0.13-0ubuntu2",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3",
"evidence": "/affected/8/versions"
},
{
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"evidence": "/affected/8/versions"
},
{
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"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.3",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.4",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.5",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.6",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.7",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.9",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.11",
"evidence": "/affected/8/versions"
},
{
"value": "3.0.13-0ubuntu3.12",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "openssl-fips",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.0.13-0ubuntu3.15+Fips1",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": [
{
"value": "3.0.13-0ubuntu3+Fips1",
"evidence": "/affected/9/versions"
},
{
"value": "3.0.13-0ubuntu3.6+Fips1",
"evidence": "/affected/9/versions"
},
{
"value": "3.0.13-0ubuntu3.12+Fips1",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "edk2",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2025.11-3ubuntu7",
"evidence": "/affected/10/versions"
},
{
"value": "2025.11-3ubuntu8",
"evidence": "/affected/10/versions"
},
{
"value": "2026.05-2ubuntu1",
"evidence": "/affected/10/versions"
},
{
"value": "2026.05-2ubuntu2",
"evidence": "/affected/10/versions"
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{
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"https://www.cve.org/CVERecord?id=CVE-2026-63076",
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