Vulnerability-Lookup

CVE-2026-43620 (GCVE-0-2026-43620)

Vulnerability from cvelistv5 – Published: 2026-05-20 00:47 – Updated: 2026-07-14 20:01

Title

Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files()

Summary

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.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-20 14:11 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6373 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/RsyncProject/rsync/security/ad…	vendor-advisory
https://github.com/RsyncProject/rsync/releases/ta…	release-notes
https://www.vulncheck.com/advisories/rsync-out-of…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
RsyncProject	rsync	Affected: 0 , < 3.4.3 (semver) cpe:2.3:a:samba:rsync::::::::

Date Public

2026-05-19 00:00

Credits

Pratham Gupta (@alchemy1729)

Show details on NVD website

JSON

To clipboard

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              "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm"
            },
            {
              "tags": [
                "release-notes"
              ],
              "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Rsync \u003c 3.4.3 Out-of-Bounds Array Read via recv_files()",
          "x_generator": {
            "engine": "Vulnogram 1.0.1"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-43620",
        "datePublished": "2026-05-20T00:47:57.086Z",
        "dateReserved": "2026-05-01T18:22:45.639Z",
        "dateUpdated": "2026-07-14T20:01:07.518Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

BELL-CVE-2026-43620 (CVE-2026-43620)

Vulnerability from osv_bellsoft – Published: 2026-05-21 06:10 – Updated: 2026-05-25 16:57 – Source website

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

URL

Type

https://docs.bell-sw.com/security/cves/CVE-2026-43620

ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Alpaquita:23",
        "name": "rsync",
        "purl": "pkg:apk/alpaquita/rsync?arch=source\u0026distro=23"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.7-r0"
            },
            {
              "fixed": "3.4.3-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Alpaquita:25",
        "name": "rsync",
        "purl": "pkg:apk/alpaquita/rsync?arch=source\u0026distro=25"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.4.1-r0"
            },
            {
              "fixed": "3.4.3-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Alpaquita:stream",
        "name": "rsync",
        "purl": "pkg:apk/alpaquita/rsync?arch=source\u0026distro=stream"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.5-r0"
            },
            {
              "fixed": "3.4.3-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "id": "BELL-CVE-2026-43620",
  "modified": "2026-05-25T16:57:20.737665Z",
  "published": "2026-05-21T06:10:53.988717Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://docs.bell-sw.com/security/cves/CVE-2026-43620"
    }
  ],
  "schema_version": "1.7.4",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-43620"
  ]
}

FKIE_CVE-2026-43620

Vulnerability from fkie_nvd - Published: 2026-05-20 02:16 - Updated: 2026-07-24 09:10

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Summary

References

URL	Tags
disclosure@vulncheck.com	https://github.com/RsyncProject/rsync/releases/tag/v3.4.3	Release Notes
disclosure@vulncheck.com	https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm	Vendor Advisory
disclosure@vulncheck.com	https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files	Third Party Advisory

Impacted products

	Vendor	Product	Version
	samba	rsync	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/RsyncProject/rsync",
          "product": "rsync",
          "repo": "https://github.com/RsyncProject/rsync",
          "vendor": "RsyncProject",
          "versions": [
            {
              "lessThan": "3.4.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EC81F4B6-4EC5-433C-9709-E4B9E340C65A",
              "versionEndIncluding": "3.4.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Rsync version\u00a03.4.2 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."
    },
    {
      "lang": "es",
      "value": "La versi\u00f3n 3.4.2 de Rsync y anteriores contienen una vulnerabilidad de lectura de array fuera de l\u00edmites en el lado del receptor en recv_files() en receiver.c que permite a un servidor rsync malicioso bloquear el proceso del cliente rsync. Los atacantes pueden explotar la vulnerabilidad al establecer CF_INC_RECURSE en los indicadores de compatibilidad y enviar una lista de archivos especialmente dise\u00f1ada donde la primera entrada ordenada no es el directorio de punto inicial, seguido de un registro de transferencia con ndx=0 y una palabra iflag sin ITEM_TRANSFER, lo que hace que el receptor lea 8 bytes antes del array de punteros asignado y desreferencie un puntero inv\u00e1lido en una direcci\u00f3n no mapeada, lo que resulta en un bloqueo SIGSEGV determinista del cliente rsync."
    }
  ],
  "id": "CVE-2026-43620",
  "lastModified": "2026-07-24T09:10:00.153",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43620",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-20T14:11:42.448773Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-20T02:16:36.727",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-JMF6-74R8-6C28

Vulnerability from github – Published: 2026-05-20 03:31 – Updated: 2026-05-21 21:30

Details

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-43620"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-20T02:16:36Z",
    "severity": "MODERATE"
  },
  "details": "Rsync version\u00a03.4.2 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.",
  "id": "GHSA-jmf6-74r8-6c28",
  "modified": "2026-05-21T21:30:31Z",
  "published": "2026-05-20T03:31:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RsyncProject/rsync/security/advisories/GHSA-28pw-r563-rxvm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    },
    {
      "type": "WEB",
      "url": "https://github.com/RsyncProject/rsync/releases/tag/v3.4.3"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/rsync-out-of-bounds-array-read-via-recv-files"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

MSRC_CVE-2026-43620

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-23 01:38

Summary

Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files()

Scope

1 vulnerability in this advisory, including CVE-2026-43620.

CVE-2026-43620

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OESA-2026-2549 (CVE-2026-43620)

Vulnerability from osv_openeuler – Published: 2026-06-05 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

rsync security update

Details

Rsync is an open source utility that provides fast incremental file transfer. It uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.

Security Fix(es):

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-43620	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "rsync-3.2.7-11.oe2403sp3.aarch64.rpm",
          "rsync-debuginfo-3.2.7-11.oe2403sp3.aarch64.rpm",
          "rsync-debugsource-3.2.7-11.oe2403sp3.aarch64.rpm",
          "rsync-help-3.2.7-11.oe2403sp3.aarch64.rpm"
        ],
        "src": [
          "rsync-3.2.7-11.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "rsync-3.2.7-11.oe2403sp3.x86_64.rpm",
          "rsync-debuginfo-3.2.7-11.oe2403sp3.x86_64.rpm",
          "rsync-debugsource-3.2.7-11.oe2403sp3.x86_64.rpm",
          "rsync-help-3.2.7-11.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "rsync",
        "purl": "pkg:rpm/openEuler/rsync\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.7-11.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Rsync is an open source utility that provides fast incremental file transfer. It uses the \u0026amp;quot;rsync algorithm\u0026amp;quot; which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.\r\n\r\nSecurity Fix(es):\n\nRsync version\u00a03.4.2 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.(CVE-2026-43620)",
  "id": "OESA-2026-2549",
  "modified": "2026-08-06T11:11:29Z",
  "published": "2026-06-05T11:11:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2549"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rsync security update",
  "upstream": [
    "CVE-2026-43620"
  ]
}

OESA-2026-2550 (CVE-2026-43618)

Vulnerability from osv_openeuler – Published: 2026-06-05 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

rsync security update

Details

Security Fix(es):

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.(CVE-2026-43618)

Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.(CVE-2026-45232)

Severity

8.1 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-43618	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-43620	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-45232	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "rsync-3.1.3-14.oe2003sp4.aarch64.rpm",
          "rsync-debuginfo-3.1.3-14.oe2003sp4.aarch64.rpm",
          "rsync-debugsource-3.1.3-14.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "rsync-help-3.1.3-14.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "rsync-3.1.3-14.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "rsync-3.1.3-14.oe2003sp4.x86_64.rpm",
          "rsync-debuginfo-3.1.3-14.oe2003sp4.x86_64.rpm",
          "rsync-debugsource-3.1.3-14.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "rsync",
        "purl": "pkg:rpm/openEuler/rsync\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.1.3-14.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Rsync is an open source utility that provides fast incremental file transfer. It uses the \u0026amp;quot;rsync algorithm\u0026amp;quot; which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.\r\n\r\nSecurity Fix(es):\n\nRsync version\u00a03.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.(CVE-2026-43618)\n\nRsync version\u00a03.4.2 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.(CVE-2026-43620)\n\nRsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.(CVE-2026-45232)",
  "id": "OESA-2026-2550",
  "modified": "2026-08-06T11:11:29Z",
  "published": "2026-06-05T11:11:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2550"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43618"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45232"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rsync security update",
  "upstream": [
    "CVE-2026-43618",
    "CVE-2026-43620",
    "CVE-2026-45232"
  ]
}

OESA-2026-2551 (CVE-2026-43620)

Vulnerability from osv_openeuler – Published: 2026-06-05 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

rsync security update

Details

Security Fix(es):

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-43620	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "rsync-3.2.5-8.oe2203sp4.aarch64.rpm",
          "rsync-debuginfo-3.2.5-8.oe2203sp4.aarch64.rpm",
          "rsync-debugsource-3.2.5-8.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "rsync-help-3.2.5-8.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "rsync-3.2.5-8.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "rsync-3.2.5-8.oe2203sp4.x86_64.rpm",
          "rsync-debuginfo-3.2.5-8.oe2203sp4.x86_64.rpm",
          "rsync-debugsource-3.2.5-8.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "rsync",
        "purl": "pkg:rpm/openEuler/rsync\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.5-8.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Rsync is an open source utility that provides fast incremental file transfer. It uses the \u0026amp;quot;rsync algorithm\u0026amp;quot; which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.\r\n\r\nSecurity Fix(es):\n\nRsync version\u00a03.4.2 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.(CVE-2026-43620)",
  "id": "OESA-2026-2551",
  "modified": "2026-08-06T11:11:29Z",
  "published": "2026-06-05T11:11:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2551"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rsync security update",
  "upstream": [
    "CVE-2026-43620"
  ]
}

OESA-2026-2552 (CVE-2026-43620)

Vulnerability from osv_openeuler – Published: 2026-06-05 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

rsync security update

Details

Security Fix(es):

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-43620	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "rsync-3.2.7-11.oe2403sp1.aarch64.rpm",
          "rsync-debuginfo-3.2.7-11.oe2403sp1.aarch64.rpm",
          "rsync-debugsource-3.2.7-11.oe2403sp1.aarch64.rpm",
          "rsync-help-3.2.7-11.oe2403sp1.aarch64.rpm"
        ],
        "src": [
          "rsync-3.2.7-11.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "rsync-3.2.7-11.oe2403sp1.x86_64.rpm",
          "rsync-debuginfo-3.2.7-11.oe2403sp1.x86_64.rpm",
          "rsync-debugsource-3.2.7-11.oe2403sp1.x86_64.rpm",
          "rsync-help-3.2.7-11.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "rsync",
        "purl": "pkg:rpm/openEuler/rsync\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.7-11.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Rsync is an open source utility that provides fast incremental file transfer. It uses the \u0026amp;quot;rsync algorithm\u0026amp;quot; which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand.\r\n\r\nSecurity Fix(es):\n\nRsync version\u00a03.4.2 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.(CVE-2026-43620)",
  "id": "OESA-2026-2552",
  "modified": "2026-08-06T11:11:29Z",
  "published": "2026-06-05T11:11:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2552"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43620"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "rsync security update",
  "upstream": [
    "CVE-2026-43620"
  ]
}

OPENSUSE-SU-2026:10857-1

Vulnerability from csaf_opensuse - Published: 2026-05-24 00:00 - Updated: 2026-09-17 17:06

Summary

rsync-3.4.3-1.1 on GA media

Severity

Moderate

Scope

6 vulnerabilities in this advisory, including CVE-2026-43620.

CVE-2026-43620

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Recommended: 4 products

Open the full advisory

OPENSUSE-SU-2026:20877-1

Vulnerability from csaf_opensuse - Published: 2026-06-02 09:13 - Updated: 2026-09-17 17:34

Summary

Security update for rsync

Severity

Important

Scope

8 vulnerabilities in this advisory, including CVE-2026-43620.

CVE-2026-43620

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Recommended: 4 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CVE-2026-43620 (GCVE-0-2026-43620)

BELL-CVE-2026-43620 (CVE-2026-43620)

FKIE_CVE-2026-43620

GHSA-JMF6-74R8-6C28

MSRC_CVE-2026-43620

OESA-2026-2549 (CVE-2026-43620)

OESA-2026-2550 (CVE-2026-43618)

OESA-2026-2551 (CVE-2026-43620)

OESA-2026-2552 (CVE-2026-43620)

OPENSUSE-SU-2026:10857-1

OPENSUSE-SU-2026:20877-1

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