{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-75805", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "state": "PUBLISHED", "assignerShortName": "openssl", "dateReserved": "2026-08-18T09:34:32.659Z", "datePublished": "2026-09-29T15:32:20.408Z", "dateUpdated": "2026-09-29T16:54:39.263Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.3", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.5", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.9", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.8", "status": "affected", "version": "3.4.0", "versionType": "semver"}, {"lessThan": "3.0.23", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Norbert Pocs"}], "datePublic": "2026-09-29T14:21:57.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "Issue summary: A CMP client that requests certificate revocation on the basis<br>of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when<br>processing a crafted revocation response. <br><br>Impact summary: The NULL pointer dereference happens on a read which <br>leads to a crash and a Denial of Service for the affected client application.<br><br>CWE: CWE-476: NULL-pointer dereference<br><br>Description: A CMP client revoking a certificate has to tell the server which<br>certificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the<br>certificate itself or its issuer name and serial number. This is<br>'openssl cmp -cmd rr -csr <file>' on the command line, or<br>OSSL_CMP_exec_RR_ses() with the certificate supplied via<br>OSSL_CMP_CTX_set1_p10CSR() through the API.<br><br>A CSR does not contain the issuer name and serial number of the certificate,<br>so the client does not send them. A server may optionally name the<br>certificate it revoked in its response, and the client then compares that<br>name against what it sent. Having sent neither an issuer name nor a serial<br>number, it has nothing to compare against, and a server returning a specially<br>crafted name causes the client to read from a NULL pointer and crash.<br><br>The revocation response is checked for valid message protection before<br>the affected code is reached, so an attacker must be a malicious or<br>compromised CMP server, or a man-in-the-middle in possession of the<br>secret used for message protection. Clients that identify the certificate<br>to be revoked by a certificate or by issuer and serial number rather<br>than by a PKCS#10 CSR are not affected.<br><br>FIPS impact: no<br>No FIPS modules are affected by this issue, as the CMP protocol<br>implementation is outside the OpenSSL FIPS module boundary."}], "value": "Issue summary: A CMP client that requests certificate revocation on the basis\nof a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when\nprocessing a crafted revocation response. \n\nImpact summary: The NULL pointer dereference happens on a read which \nleads to a crash and a Denial of Service for the affected client application.\n\nCWE: CWE-476: NULL-pointer dereference\n\nDescription: A CMP client revoking a certificate has to tell the server which\ncertificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the\ncertificate itself or its issuer name and serial number. This is\n'openssl cmp -cmd rr -csr <file>' on the command line, or\nOSSL_CMP_exec_RR_ses() with the certificate supplied via\nOSSL_CMP_CTX_set1_p10CSR() through the API.\n\nA CSR does not contain the issuer name and serial number of the certificate,\nso the client does not send them. A server may optionally name the\ncertificate it revoked in its response, and the client then compares that\nname against what it sent. Having sent neither an issuer name nor a serial\nnumber, it has nothing to compare against, and a server returning a specially\ncrafted name causes the client to read from a NULL pointer and crash.\n\nThe revocation response is checked for valid message protection before\nthe affected code is reached, so an attacker must be a malicious or\ncompromised CMP server, or a man-in-the-middle in possession of the\nsecret used for message protection. Clients that identify the certificate\nto be revoked by a certificate or by issuer and serial number rather\nthan by a PKCS#10 CSR are not affected.\n\nFIPS impact: no\nNo FIPS modules are affected by this issue, as the CMP protocol\nimplementation is outside the OpenSSL FIPS module boundary."}], "metrics": [{"format": "other", "other": {"content": {"text": "Low"}, "type": "https://openssl-library.org/policies/general/security-policy/"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-476", "description": "CWE-476 NULL-pointer dereference", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "shortName": "openssl", "dateUpdated": "2026-09-29T15:32:20.408Z"}, "references": [{"name": "OpenSSL Advisory", "tags": ["vendor-advisory"], "url": "https://openssl-library.org/news/secadv/20260929.txt"}, {"name": "4.0.3 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/7ca0ccb5172a577e9b87267d77bfe21e5481a5e7"}, {"name": "3.6.5 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/7588db7fef14209c3caa3a101d11a02006b19166"}, {"name": "3.5.9 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/9eb2a8a9b86136cdb39d6d7d50644dd66941cdc3"}, {"name": "3.4.8 git commit", "tags": ["patch"], "url": "https://github.com/openssl/openssl/commit/abf02872a4b71767ecc72293424420f5b009190f"}], "source": {"discovery": "UNKNOWN"}, "title": "NULL Pointer Dereference in CMP Client Revocation Response Handling", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-09-29T16:54:03.315064Z", "id": "CVE-2026-75805", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-29T16:54:39.263Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-75805", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-29T16:54:03.315064Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-29T16:54:26.744Z"}}], "cna": {"title": "NULL Pointer Dereference in CMP Client Revocation Response Handling", "source": {"discovery": "UNKNOWN"}, "credits": [{"lang": "en", "type": "reporter", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Bhabani Sankar Das"}, {"lang": "en", "type": "remediation developer", "value": "Norbert Pocs"}], "metrics": [{"other": {"type": "https://openssl-library.org/policies/general/security-policy/", "content": {"text": "Low"}}, "format": "other"}], "affected": [{"vendor": "OpenSSL", "product": "OpenSSL", "versions": [{"status": "affected", "version": "4.0.0", "lessThan": "4.0.3", "versionType": "semver"}, {"status": "affected", "version": "3.6.0", "lessThan": "3.6.5", "versionType": "semver"}, {"status": "affected", "version": "3.5.0", "lessThan": "3.5.9", "versionType": "semver"}, {"status": "affected", "version": "3.4.0", "lessThan": "3.4.8", "versionType": "semver"}, {"status": "affected", "version": "3.0.0", "lessThan": "3.0.23", "versionType": "semver"}], "defaultStatus": "unaffected"}], "datePublic": "2026-09-29T14:21:57.000Z", "references": [{"url": "https://openssl-library.org/news/secadv/20260929.txt", "name": "OpenSSL Advisory", "tags": ["vendor-advisory"]}, {"url": "https://github.com/openssl/openssl/commit/7ca0ccb5172a577e9b87267d77bfe21e5481a5e7", "name": "4.0.3 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/7588db7fef14209c3caa3a101d11a02006b19166", "name": "3.6.5 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/9eb2a8a9b86136cdb39d6d7d50644dd66941cdc3", "name": "3.5.9 git commit", "tags": ["patch"]}, {"url": "https://github.com/openssl/openssl/commit/abf02872a4b71767ecc72293424420f5b009190f", "name": "3.4.8 git commit", "tags": ["patch"]}], "x_generator": {"engine": "Vulnogram 0.2.0"}, "descriptions": [{"lang": "en", "value": "Issue summary: A CMP client that requests certificate revocation on the basis\nof a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when\nprocessing a crafted revocation response. \n\nImpact summary: The NULL pointer dereference happens on a read which \nleads to a crash and a Denial of Service for the affected client application.\n\nCWE: CWE-476: NULL-pointer dereference\n\nDescription: A CMP client revoking a certificate has to tell the server which\ncertificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the\ncertificate itself or its issuer name and serial number. This is\n'openssl cmp -cmd rr -csr <file>' on the command line, or\nOSSL_CMP_exec_RR_ses() with the certificate supplied via\nOSSL_CMP_CTX_set1_p10CSR() through the API.\n\nA CSR does not contain the issuer name and serial number of the certificate,\nso the client does not send them. A server may optionally name the\ncertificate it revoked in its response, and the client then compares that\nname against what it sent. Having sent neither an issuer name nor a serial\nnumber, it has nothing to compare against, and a server returning a specially\ncrafted name causes the client to read from a NULL pointer and crash.\n\nThe revocation response is checked for valid message protection before\nthe affected code is reached, so an attacker must be a malicious or\ncompromised CMP server, or a man-in-the-middle in possession of the\nsecret used for message protection. Clients that identify the certificate\nto be revoked by a certificate or by issuer and serial number rather\nthan by a PKCS#10 CSR are not affected.\n\nFIPS impact: no\nNo FIPS modules are affected by this issue, as the CMP protocol\nimplementation is outside the OpenSSL FIPS module boundary.", "supportingMedia": [{"type": "text/html", "value": "Issue summary: A CMP client that requests certificate revocation on the basis<br>of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when<br>processing a crafted revocation response. <br><br>Impact summary: The NULL pointer dereference happens on a read which <br>leads to a crash and a Denial of Service for the affected client application.<br><br>CWE: CWE-476: NULL-pointer dereference<br><br>Description: A CMP client revoking a certificate has to tell the server which<br>certificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the<br>certificate itself or its issuer name and serial number. This is<br>'openssl cmp -cmd rr -csr <file>' on the command line, or<br>OSSL_CMP_exec_RR_ses() with the certificate supplied via<br>OSSL_CMP_CTX_set1_p10CSR() through the API.<br><br>A CSR does not contain the issuer name and serial number of the certificate,<br>so the client does not send them. A server may optionally name the<br>certificate it revoked in its response, and the client then compares that<br>name against what it sent. Having sent neither an issuer name nor a serial<br>number, it has nothing to compare against, and a server returning a specially<br>crafted name causes the client to read from a NULL pointer and crash.<br><br>The revocation response is checked for valid message protection before<br>the affected code is reached, so an attacker must be a malicious or<br>compromised CMP server, or a man-in-the-middle in possession of the<br>secret used for message protection. Clients that identify the certificate<br>to be revoked by a certificate or by issuer and serial number rather<br>than by a PKCS#10 CSR are not affected.<br><br>FIPS impact: no<br>No FIPS modules are affected by this issue, as the CMP protocol<br>implementation is outside the OpenSSL FIPS module boundary.", "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": "2026-09-29T15:32:20.408Z"}}}, "cveMetadata": {"cveId": "CVE-2026-75805", "state": "PUBLISHED", "dateUpdated": "2026-09-29T16:54:39.263Z", "dateReserved": "2026-08-18T09:34:32.659Z", "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5", "datePublished": "2026-09-29T15:32:20.408Z", "assignerShortName": "openssl"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "OpenSSL", "vendor": "OpenSSL", "versions": [{"lessThan": "4.0.3", "status": "affected", "version": "4.0.0", "versionType": "semver"}, {"lessThan": "3.6.5", "status": "affected", "version": "3.6.0", "versionType": "semver"}, {"lessThan": "3.5.9", "status": "affected", "version": "3.5.0", "versionType": "semver"}, {"lessThan": "3.4.8", "status": "affected", "version": "3.4.0", "versionType": "semver"}, {"lessThan": "3.0.23", "status": "affected", "version": "3.0.0", "versionType": "semver"}]}], "source": "openssl-security@openssl.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Issue summary: A CMP client that requests certificate revocation on the basis\nof a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when\nprocessing a crafted revocation response. \n\nImpact summary: The NULL pointer dereference happens on a read which \nleads to a crash and a Denial of Service for the affected client application.\n\nCWE: CWE-476: NULL-pointer dereference\n\nDescription: A CMP client revoking a certificate has to tell the server which\ncertificate to revoke, and may do so by supplying a PKCS#10 CSR instead of the\ncertificate itself or its issuer name and serial number. This is\n'openssl cmp -cmd rr -csr <file>' on the command line, or\nOSSL_CMP_exec_RR_ses() with the certificate supplied via\nOSSL_CMP_CTX_set1_p10CSR() through the API.\n\nA CSR does not contain the issuer name and serial number of the certificate,\nso the client does not send them. A server may optionally name the\ncertificate it revoked in its response, and the client then compares that\nname against what it sent. Having sent neither an issuer name nor a serial\nnumber, it has nothing to compare against, and a server returning a specially\ncrafted name causes the client to read from a NULL pointer and crash.\n\nThe revocation response is checked for valid message protection before\nthe affected code is reached, so an attacker must be a malicious or\ncompromised CMP server, or a man-in-the-middle in possession of the\nsecret used for message protection. Clients that identify the certificate\nto be revoked by a certificate or by issuer and serial number rather\nthan by a PKCS#10 CSR are not affected.\n\nFIPS impact: no\nNo FIPS modules are affected by this issue, as the CMP protocol\nimplementation is outside the OpenSSL FIPS module boundary."}], "id": "CVE-2026-75805", "lastModified": "2026-09-29T17:17:09.620", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75805", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-29T16:54:03.315064Z", "version": "2.0.3"}}]}, "published": "2026-09-29T16:17:11.063", "references": [{"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/openssl/commit/7588db7fef14209c3caa3a101d11a02006b19166"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/openssl/commit/7ca0ccb5172a577e9b87267d77bfe21e5481a5e7"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/openssl/commit/9eb2a8a9b86136cdb39d6d7d50644dd66941cdc3"}, {"source": "openssl-security@openssl.org", "url": "https://github.com/openssl/openssl/commit/abf02872a4b71767ecc72293424420f5b009190f"}, {"source": "openssl-security@openssl.org", "url": "https://openssl-library.org/news/secadv/20260929.txt"}], "sourceIdentifier": "openssl-security@openssl.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "openssl-security@openssl.org", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.0.0,4.0.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.6.0,3.6.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.5.0,3.5.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.4.0,3.4.8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.0.0,3.0.23)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "OpenSSL", "source": "cna", "vendor": "OpenSSL"}, "product": "openssl", "vendor": "openssl"}], "created": "2026-09-29T17:30:17.062787+00:00", "updated": "2026-09-29T17:30:17.062809+00:00", "vendors": ["openssl", "openssl$PRODUCT$openssl"]}