CVE-2026-75805

{"id": "CVE-2026-75805", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-75805", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-29T16:54:03.315064Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"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"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "openssl-security@openssl.org", "affectedData": [{"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"}]}], "published": "2026-09-29T16:17:11.063", "references": [{"url": "https://github.com/openssl/openssl/commit/7588db7fef14209c3caa3a101d11a02006b19166", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://github.com/openssl/openssl/commit/7ca0ccb5172a577e9b87267d77bfe21e5481a5e7", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://github.com/openssl/openssl/commit/9eb2a8a9b86136cdb39d6d7d50644dd66941cdc3", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://github.com/openssl/openssl/commit/abf02872a4b71767ecc72293424420f5b009190f", "tags": ["Patch"], "source": "openssl-security@openssl.org"}, {"url": "https://openssl-library.org/news/secadv/20260929.txt", "tags": ["Vendor Advisory"], "source": "openssl-security@openssl.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "openssl-security@openssl.org", "description": [{"lang": "en", "value": "CWE-476"}]}], "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."}], "lastModified": "2026-10-08T01:20:24.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C9AFA409-BE77-40FB-8191-3405AC8F52C0", "versionEndExcluding": "3.0.23", "versionStartIncluding": "3.0.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "707E1EC7-0538-4F9F-96CB-C89FECC1F3ED", "versionEndExcluding": "3.4.8", "versionStartIncluding": "3.4.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B822E02B-8728-4C34-98BC-52D0A0A735B3", "versionEndExcluding": "3.5.9", "versionStartIncluding": "3.5.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96C892B6-618B-4CB9-85B6-76C641D17532", "versionEndExcluding": "3.6.5", "versionStartIncluding": "3.6.0"}, {"criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BC4A99CC-483D-4C81-A95F-6AEB2BF1B500", "versionEndExcluding": "4.0.3", "versionStartIncluding": "4.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "openssl-security@openssl.org"}