Vulnerability DatabaseCVE-2026-70458
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CVE-2026-70458
Published:August 13, 2026
Updated:August 31, 2026
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.
Affected Packages
https://github.com/RsyncProject/rsync.git (GITHUB):
Affected version(s) >=v3.0.0 <v3.5.0
Fix Suggestion:
Update to version v3.5.0
Related Resources (6)
https://github.com/RsyncProject/rsync/security/advisories/GHSA-gg3m-4m9m-268h
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70458.json
https://nvd.nist.gov/vuln/detail/CVE-2026-70458
https://github.com/RsyncProject/rsync
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
https://www.vulncheck.com/advisories/rsync-out-of-bounds-write-via-flag-hlinked-handling
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
CWE-787
EPSS
Base Score:
0.40