{
  "document": {
    "aggregate_severity": {
      "text": "Medium"
    },
    "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/oraclelinux6els/vex/2026/cve-2026-43620-els_os-oraclelinux6els.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-05-22T16:06:18Z",
      "generator": {
        "date": "2026-05-22T16:06:18Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2026-43620-ELS_OS-ORACLELINUX6ELS",
      "initial_release_date": "2026-05-20T02:16:00Z",
      "revision_history": [
        {
          "date": "2026-05-20T02:16:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-05-22T16:06:18Z",
          "number": "2",
          "summary": "Official Publication"
        }
      ],
      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2026-43620"
  },
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        "relates_to_product_reference": "Oracle-Linux-6"
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-43620",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "Rsync version 3.4.2 and prior contain a receiver-side out-of-bounds array read vulnerability in recv_files() in receiver.c that allows a malicious rsync server to crash the rsync client process. Attackers can exploit the vulnerability by setting CF_INC_RECURSE in compatibility flags and sending a specially crafted file list where the first sorted entry is not the leading dot directory, followed by a transfer record with ndx=0 and an iflag word without ITEM_TRANSFER, causing the receiver to read 8 bytes before the allocated pointer array and dereference an invalid pointer at an unmapped address, resulting in a deterministic SIGSEGV crash of the rsync client.",
          "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"
        }
      ],
      "product_status": {
        "known_affected": [
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64",
          "Oracle-Linux-6:rsync-0:3.0.6-12.el6.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-43620"
        },
        {
          "category": "external",
          "summary": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3",
          "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"
        },
        {
          "category": "external",
          "summary": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm",
          "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files",
          "url": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"
        }
      ],
      "release_date": "2026-05-20T02:16:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-05-21T12:08:32.891110Z",
          "details": "- Exploitation requires the rsync client to actively connect to and exchange a file list with an attacker‑controlled rsync server; without initiating a sync to an untrusted remote, the condition cannot be triggered. \n- The flaw causes a deterministic client‑side crash (SIGSEGV) from an out‑of‑bounds read, with no confidentiality or integrity impact, so the effect is limited to availability of the rsync process. \n- In centrally managed environments where rsync remotes are preapproved and restricted to trusted endpoints, the prerequisite of a malicious server is absent, making the practical risk low and suitable for deprioritization.",
          "product_ids": [
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els1.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els2.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els3.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els4.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els5.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els6.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.tuxcare.els7.x86_64",
            "Oracle-Linux-6:rsync-0:3.0.6-12.el6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}