Vulnerability-Lookup

CVE-2026-63076 (GCVE-0-2026-63076)

Vulnerability from cvelistv5 – Published: 2026-08-25 13:00 – Updated: 2026-08-25 14:37

Title

Invalid Pointer Dereference in CMP Server via Crafted protectionAlg

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 memory disclosure, no controlled memory write, and no path to code execution. CMP is a specialized feature that an application must explicitly enable. FIPS impact: no As the CMP code lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-25 14:37 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

openssl mitre root

References

6 references

URL	Tags
https://openssl-library.org/news/secadv/20260825.txt	vendor-advisory
https://github.com/openssl/openssl/commit/a17cc8d…	patch
https://github.com/openssl/openssl/commit/a7af46a…	patch
https://github.com/openssl/openssl/commit/cdacfff…	patch
https://github.com/openssl/openssl/commit/a1f348c…	patch
https://github.com/openssl/openssl/commit/37882aa…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
OpenSSL	OpenSSL	Affected: 4.0.0 , < 4.0.2 (semver) Affected: 3.6.0 , < 3.6.4 (semver) Affected: 3.5.0 , < 3.5.8 (semver) Affected: 3.4.0 , < 3.4.7 (semver) Affected: 3.0.0 , < 3.0.22 (semver)	guessed

Date Public

2026-08-25 11:36

Credits

Ying Dong Bhabani Sankar Das Daniel Kubec

Show details on NVD website

JSON

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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-63076\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-25T14:37:28.943884Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-25T14:37:23.862Z\"}}], \"cna\": {\"title\": \"Invalid Pointer Dereference in CMP Server via Crafted protectionAlg\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Ying Dong\"}, {\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Bhabani Sankar Das\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Daniel Kubec\"}], \"metrics\": [{\"other\": {\"type\": \"https://openssl-library.org/policies/general/security-policy/\", \"content\": {\"text\": \"Moderate\"}}, \"format\": \"other\"}], \"affected\": [{\"vendor\": \"OpenSSL\", \"product\": \"OpenSSL\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.0.0\", \"lessThan\": \"4.0.2\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.6.0\", \"lessThan\": \"3.6.4\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.5.0\", \"lessThan\": \"3.5.8\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.4.0\", \"lessThan\": \"3.4.7\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"3.0.0\", \"lessThan\": \"3.0.22\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-08-25T11:36:16.000Z\", \"references\": [{\"url\": \"https://openssl-library.org/news/secadv/20260825.txt\", \"name\": \"OpenSSL Advisory\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e\", \"name\": \"4.0.2 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226\", \"name\": \"3.6.4 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c\", \"name\": \"3.5.8 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259\", \"name\": \"3.4.7 git commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b\", \"name\": \"3.0.22 git commit\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Issue summary: OpenSSL CMP password based protection verification only\\nchecks whether the protectionAlg parameter was not NULL and not its\\nASN.1 type, before treating it as a PBMParameter. A crafted message can\\ncontain a parameter of a different type, which is then dereferenced as an\\ninvalid pointer.\\n\\nImpact summary: A remote, unauthenticated attacker can crash an application\\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\\nService.\\n\\nCWE: CWE-476: NULL Pointer Dereference\\n\\nDescription: When verifying the password-based MAC protection of a CMP\\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\\nX509_ALGOR_get0(), which returns both the parameter type and its value\\npointer. The value is then cast to an ASN1_STRING and treated as the\\nexpected PBMParameter after only checking that pointer is not NULL. The\\nparameter type returned by X509_ALGOR_get0() was never consulted.\\n\\nThis happens during protection verification, before any MAC is computed, so\\nno knowledge of the PBM shared secret is required; the only precondition is\\nthat PBM verification is reachable. On the server side this is reached from\\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\\nserver accepting PBM-protected messages, and on the client side from CMP\\nresponse validation against a malicious or on-path (MITM) server. The\\nreliable consequence is a denial of service; there is no memory disclosure,\\nno controlled memory write, and no path to code execution. CMP is a\\nspecialized feature that an application must explicitly enable.\\n\\nFIPS impact: no\\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\\nare affected by this CVE.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Issue summary: OpenSSL CMP password based protection verification only\u003cbr\u003echecks whether the protectionAlg parameter was not NULL and not its\u003cbr\u003eASN.1 type, before treating it as a PBMParameter. A crafted message can\u003cbr\u003econtain a parameter of a different type, which is then dereferenced as an\u003cbr\u003einvalid pointer.\u003cbr\u003e\u003cbr\u003eImpact summary: A remote, unauthenticated attacker can crash an application\u003cbr\u003eacting as a CMP server that accepts PBM-protected messages, or a CMP client\u003cbr\u003etalking to a malicious or intercepted CMP server, resulting in a Denial of\u003cbr\u003eService.\u003cbr\u003e\u003cbr\u003eCWE: CWE-476: NULL Pointer Dereference\u003cbr\u003e\u003cbr\u003eDescription: When verifying the password-based MAC protection of a CMP\u003cbr\u003emessage, OpenSSL library reads the protectionAlg algorithm parameter with\u003cbr\u003eX509_ALGOR_get0(), which returns both the parameter type and its value\u003cbr\u003epointer. The value is then cast to an ASN1_STRING and treated as the\u003cbr\u003eexpected PBMParameter after only checking that pointer is not NULL. The\u003cbr\u003eparameter type returned by X509_ALGOR_get0() was never consulted.\u003cbr\u003e\u003cbr\u003eThis happens during protection verification, before any MAC is computed, so\u003cbr\u003eno knowledge of the PBM shared secret is required; the only precondition is\u003cbr\u003ethat PBM verification is reachable. On the server side this is reached from\u003cbr\u003eOSSL_CMP_SRV_process_request() for any application that stands up a CMP\u003cbr\u003eserver accepting PBM-protected messages, and on the client side from CMP\u003cbr\u003eresponse validation against a malicious or on-path (MITM) server. The\u003cbr\u003ereliable consequence is a denial of service; there is no memory disclosure,\u003cbr\u003eno controlled memory write, and no path to code execution. CMP is a\u003cbr\u003especialized feature that an application must explicitly enable.\u003cbr\u003e\u003cbr\u003eFIPS impact: no\u003cbr\u003eAs the CMP code lives outside the FIPS module boundary, no FIPS modules\u003cbr\u003eare affected by this CVE.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"shortName\": \"openssl\", \"dateUpdated\": \"2026-08-25T13:00:11.218Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-63076\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T14:37:32.193Z\", \"dateReserved\": \"2026-07-15T13:10:26.188Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2026-08-25T13:00:11.218Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

alsa-2026:67154

Vulnerability from osv_almalinux

Published

2026-09-14 00:00

Modified

2026-09-15 08:31

Summary

Important: openssl security, bug fix, and enhancement update

Details

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)
openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)
openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)
openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)
openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)
openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)
openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)
openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)
openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)

Bug Fix(es) and Enhancement(s):

openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 10.2.z] (JIRA:AlmaLinux-212362)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:67154	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-14456	REPORT
	https://access.redhat.com/security/cve/CVE-2026-14457	REPORT
	https://access.redhat.com/security/cve/CVE-2026-18798	REPORT
	https://access.redhat.com/security/cve/CVE-2026-54874	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63072	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63073	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63074	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63075	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63076	REPORT
	https://bugzilla.redhat.com/2515348	REPORT
	https://bugzilla.redhat.com/2517559	REPORT
	https://bugzilla.redhat.com/2517560	REPORT
	https://bugzilla.redhat.com/2517561	REPORT
	https://bugzilla.redhat.com/2517562	REPORT
	https://bugzilla.redhat.com/2517564	REPORT
	https://bugzilla.redhat.com/2517565	REPORT
	https://bugzilla.redhat.com/2517566	REPORT
	https://bugzilla.redhat.com/2517570	REPORT
	https://errata.almalinux.org/10/ALSA-2026-67154.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "openssl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el10_2.alma.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "openssl-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el10_2.alma.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "openssl-libs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el10_2.alma.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "openssl-perl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el10_2.alma.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.  \n\nSecurity Fix(es):  \n\n  * openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n  * openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n  * openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n  * openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n  * openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n  * openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n  * openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n  * openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n  * openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 10.2.z] (JIRA:AlmaLinux-212362)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:67154",
  "modified": "2026-09-15T08:31:16Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67154"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-14456"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-14457"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18798"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-54874"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63072"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63073"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63074"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63075"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63076"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2515348"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517559"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517560"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517561"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517562"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517564"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517565"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517566"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517570"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-67154.html"
    }
  ],
  "related": [
    "CVE-2026-14456",
    "CVE-2026-18798",
    "CVE-2026-63072",
    "CVE-2026-63076",
    "CVE-2026-14457",
    "CVE-2026-54874",
    "CVE-2026-63073",
    "CVE-2026-63074",
    "CVE-2026-63075"
  ],
  "summary": "Important: openssl security, bug fix, and enhancement update"
}

alsa-2026:67165

Vulnerability from osv_almalinux

Published

2026-09-14 00:00

Modified

2026-09-15 08:35

Summary

Important: openssl security, bug fix, and enhancement update

Details

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es):

openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)
openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)
openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)
openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)
openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)
openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)
openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)
openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)
openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)

Bug Fix(es) and Enhancement(s):

openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 9.8.z] (JIRA:AlmaLinux-232828)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:67165	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-14456	REPORT
	https://access.redhat.com/security/cve/CVE-2026-14457	REPORT
	https://access.redhat.com/security/cve/CVE-2026-18798	REPORT
	https://access.redhat.com/security/cve/CVE-2026-54874	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63072	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63073	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63074	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63075	REPORT
	https://access.redhat.com/security/cve/CVE-2026-63076	REPORT
	https://bugzilla.redhat.com/2515348	REPORT
	https://bugzilla.redhat.com/2517559	REPORT
	https://bugzilla.redhat.com/2517560	REPORT
	https://bugzilla.redhat.com/2517561	REPORT
	https://bugzilla.redhat.com/2517562	REPORT
	https://bugzilla.redhat.com/2517564	REPORT
	https://bugzilla.redhat.com/2517565	REPORT
	https://bugzilla.redhat.com/2517566	REPORT
	https://bugzilla.redhat.com/2517570	REPORT
	https://errata.almalinux.org/9/ALSA-2026-67165.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "openssl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "openssl-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "openssl-libs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "openssl-perl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:3.5.8-1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.  \n\nSecurity Fix(es):  \n\n  * openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n  * openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n  * openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n  * openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n  * openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n  * openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n  * openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n  * openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n  * openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 9.8.z] (JIRA:AlmaLinux-232828)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:67165",
  "modified": "2026-09-15T08:35:13Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:67165"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-14456"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-14457"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18798"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-54874"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63072"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63073"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63074"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63075"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-63076"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2515348"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517559"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517560"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517561"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517562"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517564"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517565"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517566"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2517570"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-67165.html"
    }
  ],
  "related": [
    "CVE-2026-14456",
    "CVE-2026-18798",
    "CVE-2026-63072",
    "CVE-2026-63076",
    "CVE-2026-14457",
    "CVE-2026-54874",
    "CVE-2026-63073",
    "CVE-2026-63074",
    "CVE-2026-63075"
  ],
  "summary": "Important: openssl security, bug fix, and enhancement update"
}

CERTFR-2026-AVI-1079

Vulnerability from certfr_avis - Published: 2026-08-26 - Updated: 2026-08-26

De multiples vulnérabilités ont été découvertes dans OpenSSL. Elles permettent à un attaquant de provoquer un déni de service à distance et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
OpenSSL	OpenSSL	OpenSSL versions 3.6.x antérieures à 3.6.4
OpenSSL	OpenSSL	OpenSSL versions 3.4.x antérieures à 3.4.7
OpenSSL	OpenSSL	OpenSSL versions 3.5.x antérieures à 3.5.8
OpenSSL	OpenSSL	OpenSSL versions 3.0.x antérieures à 3.0.22
OpenSSL	OpenSSL	OpenSSL versions 1.0.2x antérieures à 1.0.2zr
OpenSSL	OpenSSL	OpenSSL versions 1.1.1x antérieures à 1.1.1zi
OpenSSL	OpenSSL	OpenSSL versions 4.0.x antérieures à 4.0.2

References

Title

Publication Time

FKIE_CVE-2026-63076

Vulnerability from fkie_nvd - Published: 2026-08-25 13:19 - Updated: 2026-09-11 21:17

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b	Patch
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e	Patch
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259	Patch
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226	Patch
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c	Patch
openssl-security@openssl.org	https://openssl-library.org/news/secadv/20260825.txt	Vendor Advisory

Impacted products

Vendor	Product	Version
openssl	openssl	*
openssl	openssl	*
openssl	openssl	*
openssl	openssl	*
openssl	openssl	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
          "versions": [
            {
              "lessThan": "4.0.2",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.6.4",
              "status": "affected",
              "version": "3.6.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.5.8",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.4.7",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "3.0.22",
              "status": "affected",
              "version": "3.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "openssl-security@openssl.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5DAAFBD8-3DEE-4F6B-8D83-02966005168A",
              "versionEndExcluding": "3.0.22",
              "versionStartIncluding": "3.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "216D6529-561A-4684-A886-50954FBEBFB2",
              "versionEndExcluding": "3.4.7",
              "versionStartIncluding": "3.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C5BB9E95-09B6-4163-B51C-D62B528A04DA",
              "versionEndExcluding": "3.5.8",
              "versionStartIncluding": "3.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B1416826-F2F1-4EA8-9FB2-A56B0DA923C1",
              "versionEndExcluding": "3.6.4",
              "versionStartIncluding": "3.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "63B8F45B-E44F-481C-815D-AF9CA89C48F6",
              "versionEndExcluding": "4.0.2",
              "versionStartIncluding": "4.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE."
    }
  ],
  "id": "CVE-2026-63076",
  "lastModified": "2026-09-11T21:17:12.460",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63076",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-25T14:37:28.943884Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-25T13:19:26.543",
  "references": [
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://openssl-library.org/news/secadv/20260825.txt"
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "openssl-security@openssl.org",
      "type": "Secondary"
    }
  ]
}

GHSA-R3HF-PF7X-WGQG

Vulnerability from github – Published: 2026-08-25 15:32 – Updated: 2026-08-25 15:32

Details

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 memory disclosure, no controlled memory write, and no path to code execution. CMP is a specialized feature that an application must explicitly enable.

FIPS impact: no As the CMP code lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-63076"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T13:19:26Z",
    "severity": "HIGH"
  },
  "details": "Issue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE.",
  "id": "GHSA-r3hf-pf7x-wgqg",
  "modified": "2026-08-25T15:32:59Z",
  "published": "2026-08-25T15:32:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63076"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/37882aa2e0256e1072442a8f62f7db45b995c45b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/a17cc8d612ecff6d94a9b7ca8b5283ddf5ff570e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/a1f348ccb328c3afbd4ba6883f9b7c813c043259"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/a7af46a92d0ce19a90e669ef56d2576a07924226"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/cdacfff557389abfa9e4615abded2ec984517d6c"
    },
    {
      "type": "WEB",
      "url": "https://openssl-library.org/news/secadv/20260825.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-63076

Vulnerability from csaf_microsoft - Published: 2026-08-27 01:10 - Updated: 2026-09-13 01:50

Summary

Invalid Pointer Dereference in CMP Server via Crafted protectionAlg

Scope

1 vulnerability in this advisory, including CVE-2026-63076.

CVE-2026-63076

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 3 products Known affected: 9 products Known not affected: 1 product

Open the full advisory

OPENSUSE-SU-2026:11623-1

Vulnerability from csaf_opensuse - Published: 2026-08-27 00:00 - Updated: 2026-09-16 20:25

Summary

libopenssl-3-devel-3.5.3-8.1 on GA media

Severity

Moderate

Scope

11 vulnerabilities in this advisory, including CVE-2026-63076.

CVE-2026-63076

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 40 products

Open the full advisory

OPENSUSE-SU-2026:21744-1

Vulnerability from csaf_opensuse - Published: 2026-09-02 15:55 - Updated: 2026-09-16 20:47

Summary

Security update for openssl-3

Severity

Important

Scope

11 vulnerabilities in this advisory, including CVE-2026-63076.

CVE-2026-63076

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 19 products

Open the full advisory

RHSA-2026:59635

Vulnerability from csaf_redhat - Published: 2026-08-25 21:50 - Updated: 2026-09-14 07:58

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

8 vulnerabilities in this advisory, including CVE-2026-63076.

CVE-2026-63076

A flaw was found in OpenSSL. A crafted CMP (Certificate Management Protocol) message can cause an invalid pointer dereference due to a missing type check in the password-based protection verification. A remote, unauthenticated attacker can crash applications acting as a CMP server or client, resulting in a denial of service.

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:59635

Open the full advisory

RHSA-2026:59641

Vulnerability from csaf_redhat - Published: 2026-08-25 21:57 - Updated: 2026-09-14 07:59

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

8 vulnerabilities in this advisory, including CVE-2026-63076.

CVE-2026-63076

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Fixed: 3 products

https://access.redhat.com/errata/RHSA-2026:59641

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-63076 (GCVE-0-2026-63076)

Vulnerability from osv_almalinux

Vulnerability from osv_almalinux

Solutions

Tags

Sightings

Nomenclature

Related by attack behaviour