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    "distribution": {
      "text": "TuxCare License Agreement",
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      {
        "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"
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      "initial_release_date": "2026-09-29T16:17:00Z",
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        {
          "date": "2026-09-29T16:17:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-10-01T12:47:05Z",
          "number": "2",
          "summary": "Official Publication"
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        {
          "date": "2026-10-05T02:39:21Z",
          "number": "3",
          "summary": "Update document"
        },
        {
          "date": "2026-10-08T23:22:21Z",
          "number": "4",
          "summary": "Update document"
        }
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      "status": "final",
      "version": "4"
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        "relates_to_product_reference": "Debian-11"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.amd64 as a component of Debian 11",
          "product_id": "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.amd64"
        },
        "product_reference": "libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.amd64",
        "relates_to_product_reference": "Debian-11"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-54875",
      "cwe": {
        "id": "CWE-208",
        "name": "Observable Timing Discrepancy"
      },
      "notes": [
        {
          "category": "description",
          "text": "Issue summary: A non-constant-time optimized implementation of scalar\npoint multiplication is used for SM2 private key operations on ARM64 and\nRISC-V platforms.\n\nImpact summary: An attacker able to measure the time taken by, or to observe\nthe cache-line access pattern of SM2 signing or decryption on an affected\nplatform can learn information about the secret scalar.\n\nCWE: CWE-208: Observable Timing Discrepancy\n\nDescription: On ARM64 and RISC-V processors, the SM2 curve uses an optimized\nscalar multiplication implementation whose conditional branches and table\nlook ups are chosen according to the bits of the secret scalar. The execution\ntime and the cache-access pattern therefore depend on the long-term private\nkey (during SM2 decryption) or the per-signature nonce (during SM2 signature\ngeneration), forming a timing and cache side-channel.\n\nFIPS Impact: no\nSM2 is not a FIPS algorithm and the optimized SM2 implementation is not part\nof the FIPS module.\n\nOpenSSL 4.0, 3.6, 3.5 and 3.4 are vulnerable to this issue on AArch64 and\nRISC-V.\n\nOpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.3.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.5.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.9.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.8.\n\nThis issue was reported on 2 May 2026 by Abhinav Agarwal.\nIt was independently reported on 6 June 2026 by Feng Xue.\nThe fix was developed by Igor Ustinov.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Abhinav Agarwal, Feng Xue\nFixed by: Igor Ustinov",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "known_affected": [
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          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
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          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
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          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els3.arm64",
          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8+tuxcare.els3.armel",
          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8.amd64",
          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8.arm64",
          "Debian-11:libssl-dev-0:1.1.1w-0+deb11u8.armel",
          "Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els1.all",
          "Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els2.all",
          "Debian-11:libssl-doc-0:1.1.1w-0+deb11u8+tuxcare.els3.all",
          "Debian-11:libssl-doc-0:1.1.1w-0+deb11u8.all",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els1.amd64",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
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          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.amd64",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.arm64",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8+tuxcare.els3.armel",
          "Debian-11:libssl1.1-0:1.1.1w-0+deb11u8.amd64",
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          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els1.arm64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els1.armel",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.amd64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.arm64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els2.armel",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els3.amd64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els3.arm64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8+tuxcare.els3.armel",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8.amd64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8.arm64",
          "Debian-11:openssl-0:1.1.1w-0+deb11u8.armel"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-54875"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/3f01bbc28f7e08211fcdc797fd43816504f94257",
          "url": "https://github.com/openssl/openssl/commit/3f01bbc28f7e08211fcdc797fd43816504f94257"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/469f3e42629f4a0b5631796e20c66c92c138a3e8",
          "url": "https://github.com/openssl/openssl/commit/469f3e42629f4a0b5631796e20c66c92c138a3e8"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/9794ed473764839275cb701b4850f3c24d929c28",
          "url": "https://github.com/openssl/openssl/commit/9794ed473764839275cb701b4850f3c24d929c28"
        },
        {
          "category": "external",
          "summary": "https://github.com/openssl/openssl/commit/dddad955d5ff3e9507619cf4e0f13e9988e2197c",
          "url": "https://github.com/openssl/openssl/commit/dddad955d5ff3e9507619cf4e0f13e9988e2197c"
        },
        {
          "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": "no_fix_planned",
          "date": "2026-10-04T21:39:03.066016Z",
          "details": "Risk is limited to ARM64 and RISC‑V systems that actually perform SM2 signing or decryption with OpenSSL 3.4–4.0; OpenSSL 3.0/1.1.1 are not affected, SM2 is outside the FIPS module, and OpenSSL does not use SM2 keys in standard TLS handshakes. Exploitation requires high‑fidelity timing or co‑resident cache observation across many SM2 operations to recover nonce/key material and has no integrity or availability impact. In enterprise server/VM deployments that do not explicitly use SM2 on ARM64/RISC‑V, the vulnerable code path is not reached, so this CVE can be safely deprioritized.",
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}