CVE-2026-70458
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductRsync
PublishedAug 13, 2026
First seenAug 13, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- samba rsync3.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| RsyncProject rsync | 3.0.0 ≤ v ≤ 3.4.4 | — |
| samba rsync | 3.0.0 ≤ v < 3.5.0 | 3.5.0 |
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