CVE-2026-70456
High
Description
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.
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 | 3.0.1 ≤ v ≤ 3.4.4 | — |
| samba rsync | 3.0.1 ≤ v < 3.5.0 | 3.5.0 |
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