CVE-2026-70453
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
rsync before 3.5.0 contains an algorithmic complexity vulnerability in the hash_search() function that allows a remote attacker to cause a denial of service by delivering a carefully constructed file list. A sender can exploit the quadratic-time worst-case behavior in hash lookups to exhaust receiver CPU resources with a modest number of crafted entries, causing a sustained denial of service.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RsyncProject | rsync | 0 <= 3.4.4 | affected |
| RsyncProject | rsync | 3.5.0 | unaffected |
Weaknesses
- CWE-407: CWE-407 Inefficient Algorithmic Complexity
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-8x5r-mjx8-83hv
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://www.vulncheck.com/advisories/rsync-algorithmic-complexity-dos-via-hash-search
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