{
  "document": {
    "aggregate_severity": {
      "text": "High"
    },
    "category": "csaf_vex",
    "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"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/vex/2026/cve-2026-34478-els_os-tuxcare9_6esu.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-06-19T23:36:52Z",
      "generator": {
        "date": "2026-06-19T23:36:52Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-34478-ELS_OS-TUXCARE9.6ESU",
      "initial_release_date": "2026-04-10T16:16:00Z",
      "revision_history": [
        {
          "date": "2026-04-10T16:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-06-04T20:36:22Z",
          "number": "2",
          "summary": "Official Publication"
        },
        {
          "date": "2026-06-19T23:36:52Z",
          "number": "3",
          "summary": "Update document"
        }
      ],
      "status": "final",
      "version": "3"
    },
    "title": "Security update on CVE-2026-34478"
  },
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        "name": "AlmaLinux OS Foundation"
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        "relates_to_product_reference": "Rocky Linux-9.6"
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        },
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        "relates_to_product_reference": "Rocky Linux-9.6"
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        "relates_to_product_reference": "Rocky Linux-9.6"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-34478",
      "cwe": {
        "id": "CWE-117",
        "name": "Improper Output Neutralization for Logs"
      },
      "notes": [
        {
          "category": "description",
          "text": "Apache Log4j Core's  Rfc5424Layout https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout , in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes.\n\nTwo distinct issues affect users of stream-based syslog services who configure Rfc5424Layout directly:\n\n  *  The newLineEscape attribute was silently renamed, causing newline escaping to stop working for users of TCP framing (RFC 6587), exposing them to CRLF injection in log output.\n  *  The useTlsMessageFormat attribute was silently renamed, causing users of TLS framing (RFC 5425) to be silently downgraded to unframed TCP (RFC 6587), without newline escaping.\n\n\nUsers of the SyslogAppender are not affected, as its configuration attributes were not modified.\n\nUsers are advised to upgrade to Apache Log4j Core 2.25.4, which corrects this issue.",
          "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"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
          "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-34478"
        },
        {
          "category": "external",
          "summary": "https://github.com/apache/logging-log4j2/pull/4074",
          "url": "https://github.com/apache/logging-log4j2/pull/4074"
        },
        {
          "category": "external",
          "summary": "https://lists.apache.org/thread/3k1clr2l6vkdnl4cbhjrnt1nyjvb5gwt",
          "url": "https://lists.apache.org/thread/3k1clr2l6vkdnl4cbhjrnt1nyjvb5gwt"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/cyclonedx/vdr.xml",
          "url": "https://logging.apache.org/cyclonedx/vdr.xml"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout",
          "url": "https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout"
        },
        {
          "category": "external",
          "summary": "https://logging.apache.org/security.html#CVE-2026-34478",
          "url": "https://logging.apache.org/security.html#CVE-2026-34478"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2026/04/10/7",
          "url": "http://www.openwall.com/lists/oss-security/2026/04/10/7"
        }
      ],
      "release_date": "2026-04-10T16:16:00Z",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "AlmaLinux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "AlmaLinux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "AlmaLinux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "AlmaLinux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "Rocky Linux-9.6:log4j-jcl-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        },
        {
          "category": "impact",
          "date": "2026-06-19T22:35:27.429455Z",
          "details": "ELS ships log4j 2.17.2 for tuxcare9.6esu. CVE-2026-34478 affects Apache Log4j Core versions 2.21.0 through 2.25.3, where vulnerable Rfc5424Layout code was introduced in 2.21.0. Version 2.17.2 predates this code entirely — the vulnerable code path does not exist in the shipped package. Red Hat marks this as 'Will not fix' for the same reason.",
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            "Rocky Linux-9.6:log4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
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            "Rocky Linux-9.6:log4j-slf4j-0:2.17.2-1.el9.tuxcare.els1.noarch",
            "Rocky Linux-9.6:log4j-web-0:2.17.2-1.el9.tuxcare.els1.noarch"
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}