CVE-2026-70456rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()
Updated under an hour ago ()
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It affects RsyncProject rsync. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.
- CVSS
- 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
RsyncProject rsync rsyncproject:rsync (from the name) | from 3.0.1 through 3.4.4; 3.5.0 not affected | CNA record |
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-78jc-79jv-v6rwvendor-advisory
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0release-notes
- https://www.vulncheck.com/advisories/rsync-heap-out-of-bounds-write-via-read-argsthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.