Vulnerability details
CVE-2026-70458
RsyncProject rsync
rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling
CVSS 4.0
8.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 8.2High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| RsyncProject | rsync | 3.0.0 ≤ v ≤ 3.4.4 | CVEProject cvelistV5 (CNA) |
References and advisories
3
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Details
- Published
- 2026-08-13
- Last updated
- 2026-08-14
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.44%
Probability of exploitation in 30 days
38.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-787Out-of-bounds Write