{
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    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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    "notes": [
      {
        "category": "legal_disclaimer",
        "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.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "* SECURITY UPDATE: DTLS retransmission from a stale buffer offset can leak heap memory or crash (ssl/statem/statem_dtls.c, ssl/d1_lib.c)\n     - debian/patches/CVE-2026-84782.patch: reset init_off before retransmitting a DTLS message and skip retransmission while a handshake write is suspended\n     - CVE-2026-84782\n   * SECURITY UPDATE: excessive heap growth from certificates with many relative CRL distribution points (crypto/x509v3/v3_purp.c, v3_crld.c)\n     - debian/patches/CVE-2026-35189.patch: defer computation of relative CRLDP names until CRL processing needs them\n     - CVE-2026-35189",
        "title": "Details"
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
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      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964",
        "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964"
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        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian10els/advisories/2026/clsa-2026_1791199964.json"
      }
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      "current_release_date": "2026-10-05T11:33:36Z",
      "generator": {
        "date": "2026-10-05T11:33:36Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1791199964",
      "initial_release_date": "2026-10-05T11:33:36Z",
      "revision_history": [
        {
          "date": "2026-10-05T11:33:36Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-35189, CVE-2026-84782"
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          "text": "Issue summary: A certificate with many nameRelativeToCRLIssuer CRL\ndistribution points causes disproportionate heap growth when OpenSSL caches\nX.509 extensions.\n\nImpact summary: Receiving a crafted certificate from a malicious peer can lead\nto significant memory pressure and possible Denial of Service in clients or\nin servers that solicit client certificates.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: A certificate or a set of certificates that fits under the limit for\nsize of certificates accepted from the peer (~100 KiB) can result in allocation\nof several hundred MiB of resident memory on the receiving side\nduring a normal TLS handshake.  This may be enough to crash the client or\nserver, if multiple concurrent connections lead to similarly large memory\nallocations.\n\nThe fix postpones processing of the CRL distribution points extensions in\ncertificates to the time when the processed value is required for CRL processing.\nThis avoids keeping large memory allocations for a long time when such\ncertificates are received.\n\nFIPS impact: no\nThe affected code is outside the FIPS module boundary.",
          "title": "Vulnerability description"
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          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els2.amd64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els3.amd64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els4.amd64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els5.amd64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els6.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-35189"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/2b93c73b2c70ddc4c61c5e4bfaaa6bd71379eb84",
          "url": "https://github.com/openssl/openssl/commit/2b93c73b2c70ddc4c61c5e4bfaaa6bd71379eb84"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/3842516cc15e8b2cf55747011045e77547e71d89",
          "url": "https://github.com/openssl/openssl/commit/3842516cc15e8b2cf55747011045e77547e71d89"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/8e0efc7549b7ff8246d40e585e3fd604f728473f",
          "url": "https://github.com/openssl/openssl/commit/8e0efc7549b7ff8246d40e585e3fd604f728473f"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/c72ae182cac17a82e4246c6ecd4e9c4ec3586ec9",
          "url": "https://github.com/openssl/openssl/commit/c72ae182cac17a82e4246c6ecd4e9c4ec3586ec9"
        },
        {
          "category": "external",
          "summary": "https://openssl-library.org/news/secadv/20260929.txt",
          "url": "https://openssl-library.org/news/secadv/20260929.txt"
        }
      ],
      "release_date": "2026-09-29T16:17:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-05T11:32:46.465008Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964",
          "product_ids": [
            "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els7.amd64",
            "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
            "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els7.armel",
            "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els7.all",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.amd64",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.armel",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964"
        },
        {
          "category": "none_available",
          "date": "2026-09-29T16:17:00Z",
          "details": "Affected",
          "product_ids": [
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            "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els2.amd64",
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            "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els1.all",
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            "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els5.all",
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            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els4.amd64",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els5.amd64",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els6.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els1.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els2.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els3.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els4.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els5.amd64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els6.amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    },
    {
      "cve": "CVE-2026-84782",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "Issue summary: The DTLS retransmission logic does not correctly handle\na handshake message write that is suspended part-way through.\nThe retransmitted message can be read past the message buffer and\nthe retransmission overwrites the internal state the suspended write\nneeds to resume correctly.\n\nImpact summary: The retransmitted message can disclose a heap memory\nto the peer as plaintext handshake data or cause a crash and a Denial\nof Service when the read reaches an unmapped memory region.\n\nCWE: CWE-125: Out-of-bounds Read\n\nDescription: DTLS handshake messages can be written out in multiple\nfragments, and a write can suspend mid-message (returning WANT_WRITE)\nif the underlying transport temporarily cannot accept more data. While\nsuch a write is suspended, the DTLS retransmission timer may\nindependently fire and ask the retransmission logic to resend an\nearlier, already-acknowledged-as-sent message from its retransmit\nqueue.\n\nThe retransmission logic reused the same internal buffer and position\ntracking as the message that was still being written, without\nresetting the position back to the start of the message being\nretransmitted. As a result the retransmission was read starting from\nwherever the suspended write had left off, producing a mislabelled\nmessage whose body was leftover bytes from the other, larger message\nstill in flight - content that was never meant to be sent at that\npoint, and which could run past the end of the allocated buffer.\n\nSeparately, even when the retransmission is positioned correctly,\nallowing it to run to completion while another write is suspended\noverwrites the same shared bookkeeping that the suspended write\ndepends on to resume. When the application later resumes the\nsuspended write (via a subsequent SSL_read(), SSL_write(),\nSSL_accept(), or SSL_connect() call), it finds that bookkeeping in a\nstate inconsistent with the message and aborts the process in\na debugging build.\n\nThe fix resets the retransmission's read position to the start of the\nmessage before resending, and skips retransmission entirely whenever a\nhandshake write is still suspended, deferring to the next call that\nresumes it instead.\n\nFIPS impact: no\nThe affected code is outside the FIPS module boundary.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "fixed": [
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          "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
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          "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
          "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.armel",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.amd64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.armel"
        ],
        "known_affected": [
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          "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els2.amd64",
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          "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els3.all",
          "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els4.all",
          "Debian-10:libssl-doc-0:1.1.1n-0+deb10u6+tuxcare.els5.all",
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          "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els6.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-84782"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/906cf0ef1c85ca40ce69163e9086d6d3fe292943",
          "url": "https://github.com/openssl/openssl/commit/906cf0ef1c85ca40ce69163e9086d6d3fe292943"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/9f6b34422af7eb5dac61322e33dac1ae989fa628",
          "url": "https://github.com/openssl/openssl/commit/9f6b34422af7eb5dac61322e33dac1ae989fa628"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/a383dafdd754eb5b22bf45e37e1bff9d07277a58",
          "url": "https://github.com/openssl/openssl/commit/a383dafdd754eb5b22bf45e37e1bff9d07277a58"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/d951e02ede8f6a6ff8150546db44b34f0518192c",
          "url": "https://github.com/openssl/openssl/commit/d951e02ede8f6a6ff8150546db44b34f0518192c"
        },
        {
          "category": "external",
          "summary": "https://openssl-library.org/news/secadv/20260929.txt",
          "url": "https://openssl-library.org/news/secadv/20260929.txt"
        }
      ],
      "release_date": "2026-09-29T16:17:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-05T11:32:46.465008Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964",
          "product_ids": [
            "Debian-10:libssl-dev-0:1.1.1n-0+deb10u6+tuxcare.els7.amd64",
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            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
            "Debian-10:libssl1.1-0:1.1.1n-0+deb10u6+tuxcare.els7.armel",
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            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.arm64",
            "Debian-10:openssl-0:1.1.1n-0+deb10u6+tuxcare.els7.armel"
          ],
          "url": "https://cve.tuxcare.com/els/releases/CLSA-2026:1791199964"
        },
        {
          "category": "none_available",
          "date": "2026-09-29T16:17:00Z",
          "details": "Affected",
          "product_ids": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}