rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
RsyncProject rsync unaffected
Version Status Constraints
3.0.0 affected ≤ 3.4.4
3.5.0 unaffected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 cve-icon cve-icon
https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h cve-icon cve-icon
https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling cve-icon cve-icon
History

Thu, 13 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 13 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Description rsync 3.0.0 before 3.5.0 contains an out-of-bounds write vulnerability that allows attackers to corrupt memory by triggering HLINK_BUMP processing on file entries with the FLAG_HLINKED flag set while the hard-link preservation option is inactive. Attackers can exploit the missing F_SUM field in the file_struct layout to access memory past the end of the allocated structure, corrupting adjacent heap or stack data.
Title rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-13T15:36:31.894Z

Reserved: 2026-08-04T14:52:23.814Z

Link: CVE-2026-70458

cve-icon Vulnrichment

Updated: 2026-08-13T15:36:24.358Z

cve-icon NVD

Status : Received

Published: 2026-08-13T15:19:59.663

Modified: 2026-08-13T16:19:01.513

Link: CVE-2026-70458

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses