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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
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              "content": {
                "id": "CVE-2025-9231",
                "options": [
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                    "Exploitation": "none"
                  },
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/09/30/5"
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        ],
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenSSL",
          "vendor": "OpenSSL",
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              "status": "affected",
              "version": "3.5.0",
              "versionType": "semver"
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        {
          "lang": "en",
          "type": "reporter",
          "value": "Stanislav Fort (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Stanislav Fort (Aisle Research)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Tomas Mraz"
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              "value": "Issue summary: A timing side-channel which could potentially allow remote\u003cbr\u003erecovery of the private key exists in the SM2 algorithm implementation on 64 bit\u003cbr\u003eARM platforms.\u003cbr\u003e\u003cbr\u003eImpact summary: A timing side-channel in SM2 signature computations on 64 bit\u003cbr\u003eARM platforms could allow recovering the private key by an attacker..\u003cbr\u003e\u003cbr\u003eWhile remote key recovery over a network was not attempted by the reporter,\u003cbr\u003etiming measurements revealed a timing signal which may allow such an attack.\u003cbr\u003e\u003cbr\u003eOpenSSL does not directly support certificates with SM2 keys in TLS, and so\u003cbr\u003ethis CVE is not relevant in most TLS contexts.  However, given that it is\u003cbr\u003epossible to add support for such certificates via a custom provider, coupled\u003cbr\u003ewith the fact that in such a custom provider context the private key may be\u003cbr\u003erecoverable via remote timing measurements, we consider this to be a Moderate\u003cbr\u003eseverity issue.\u003cbr\u003e\u003cbr\u003eThe FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this\u003cbr\u003eissue, as SM2 is not an approved algorithm."
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            "type": "https://openssl-library.org/policies/general/security-policy/"
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              "cweId": "CWE-385",
              "description": "CWE-385 Covert Timing Channel",
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        "dateUpdated": "2025-09-30T13:17:12.007Z",
        "orgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
        "shortName": "openssl"
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      "references": [
        {
          "name": "OpenSSL Advisory",
          "tags": [
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          "url": "https://openssl-library.org/news/secadv/20250930.txt"
        },
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          "tags": [
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          "url": "https://github.com/openssl/openssl/commit/fc47a2ec078912b3e914fab5734535e76c4820c2"
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          "url": "https://github.com/openssl/openssl/commit/cba616c26ac8e7b37de5e77762e505ba5ca51698"
        }
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      "source": {
        "discovery": "UNKNOWN"
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      "title": "Timing side-channel in SM2 algorithm on 64 bit ARM",
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    "dateReserved": "2025-08-20T08:38:09.832Z",
    "dateUpdated": "2025-11-04T21:15:18.593Z",
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