{
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    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "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"
      }
    ],
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      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
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        "category": "self",
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        "url": "https://security.tuxcare.com/csaf/v2/els_os/debian11els/vex/2026/cve-2026-59884-els_os-debian11els.json"
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      "generator": {
        "date": "2026-09-17T22:02:53Z",
        "engine": {
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      },
      "id": "CVE-2026-59884-ELS_OS-DEBIAN11ELS",
      "initial_release_date": "2026-07-14T17:17:00Z",
      "revision_history": [
        {
          "date": "2026-07-14T17:17:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-09-17T22:02:53Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2026-59884"
  },
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        },
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        "relates_to_product_reference": "Debian-11"
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        },
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-59884",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "notes": [
        {
          "category": "description",
          "text": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.4, the BER decoder shared by the CER and DER codecs parses long-form tags by accumulating continuation octets without an upper bound on the tag ID size, allowing a crafted input to force construction of an arbitrarily large integer with CPU cost growing quadratically and to trigger unhandled ValueError exceptions in Python 3.11+ error formatting paths. Any application decoding untrusted BER, CER, or DER input is affected. This issue is fixed in version 0.6.4.",
          "title": "Vulnerability description"
        }
      ],
      "product_status": {
        "known_affected": [
          "Debian-11:pypy-pyasn1-0:0.4.8-1+deb11u2+tuxcare.els1.all",
          "Debian-11:pypy-pyasn1-0:0.4.8-1+deb11u2.all",
          "Debian-11:python-pyasn1-doc-0:0.4.8-1+deb11u2+tuxcare.els1.all",
          "Debian-11:python-pyasn1-doc-0:0.4.8-1+deb11u2.all",
          "Debian-11:python3-pyasn1-0:0.4.8-1+deb11u2+tuxcare.els1.all",
          "Debian-11:python3-pyasn1-0:0.4.8-1+deb11u2.all"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-59884"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5",
          "url": "https://github.com/pyasn1/pyasn1/commit/628e36ecbb5277a3f01572ce418ef54271b165a5"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4",
          "url": "https://github.com/pyasn1/pyasn1/releases/tag/v0.6.4"
        },
        {
          "category": "external",
          "summary": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j",
          "url": "https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j"
        }
      ],
      "release_date": "2026-07-14T17:17:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-09-14T08:05:54.277195Z",
          "details": "This is an application-layer denial‑of‑service in pyasn1’s BER/CER/DER decoder that is only reachable when a Python service actually decodes attacker‑supplied ASN.1 with pyasn1; Python’s standard TLS/SSL stack uses OpenSSL rather than pyasn1, so certificate‑handling paths aren’t affected. With no confidentiality or integrity impact and no privilege escalation—only potential CPU exhaustion or a crash on crafted inputs—the practical risk is limited to availability. In centrally managed server/VM environments that don’t expose Python endpoints parsing untrusted ASN.1, this can be safely deprioritized.",
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}