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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-28387",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
      },
      "notes": [
        {
          "category": "description",
          "text": "Issue summary: An uncommon configuration of clients performing DANE TLSA-based\nserver authentication, when paired with uncommon server DANE TLSA records, may\nresult in a use-after-free and/or double-free on the client side.\n\nImpact summary: A use after free can have a range of potential consequences\nsuch as the corruption of valid data, crashes or execution of arbitrary code.\n\nHowever, the issue only affects clients that make use of TLSA records with both\nthe PKIX-TA(0/PKIX-EE(1) certificate usages and the DANE-TA(2) certificate\nusage.\n\nBy far the most common deployment of DANE is in SMTP MTAs for which RFC7672\nrecommends that clients treat as 'unusable' any TLSA records that have the PKIX\ncertificate usages.  These SMTP (or other similar) clients are not vulnerable\nto this issue.  Conversely, any clients that support only the PKIX usages, and\nignore the DANE-TA(2) usage are also not vulnerable.\n\nThe client would also need to be communicating with a server that publishes a\nTLSA RRset with both types of TLSA records.\n\nNo FIPS modules are affected by this issue, the problem code is outside the\nFIPS module boundary.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-28387"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/07e727d304746edb49a98ee8f6ab00256e1f012b",
          "url": "https://github.com/openssl/openssl/commit/07e727d304746edb49a98ee8f6ab00256e1f012b"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/258a8f63b26995ba357f4326da00e19e29c6acbe",
          "url": "https://github.com/openssl/openssl/commit/258a8f63b26995ba357f4326da00e19e29c6acbe"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/444958deaf450aea819171f97ae69eaedede42c3",
          "url": "https://github.com/openssl/openssl/commit/444958deaf450aea819171f97ae69eaedede42c3"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/7a4e08cee62a728d32e60b0de89e6764339df0a7",
          "url": "https://github.com/openssl/openssl/commit/7a4e08cee62a728d32e60b0de89e6764339df0a7"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/ec03fa050b3346997ed9c5fef3d0e16ad7db8177",
          "url": "https://github.com/openssl/openssl/commit/ec03fa050b3346997ed9c5fef3d0e16ad7db8177"
        },
        {
          "category": "external",
          "summary": "https://openssl-library.org/news/secadv/20260407.txt",
          "url": "https://openssl-library.org/news/secadv/20260407.txt"
        }
      ],
      "release_date": "2026-04-07T00:00:00Z",
      "remediations": [
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          "category": "no_fix_planned",
          "details": "This is a client-side issue that only manifests with a highly specific, non-default DANE TLSA validation setup and requires the server to publish a mixed set of PKIX-TA/EE and DANE-TA TLSA records; standard PKI-only TLS is unaffected. The CVSS details indicate high attack complexity with no confidentiality or integrity impact and only low availability impact. Systems that do not enable DANE TLSA validation or that do not connect to servers with such mixed TLSA records have no exposure, making this a low-priority item.",
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            "availabilityImpact": "LOW",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
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