CVE-2026-70462
rsync 3.1.0 < 3.5.0 Signed Integer Overflow via MSG_IO_TIMEOUT
- State
- Published
- Severity
- 7.1 High
- Published
- Aug 13, 2026
- Updated
- Aug 14, 2026
- Reserved
- Aug 4, 2026
Description
rsync 3.1.0 before 3.5.0 contains a signed integer overflow vulnerability in the I/O timeout implementation that allows attackers to permanently disable connection timeouts by injecting MSG_IO_TIMEOUT messages carrying non-positive (zero or negative) values. Attackers can craft malicious MSG_IO_TIMEOUT messages that cause the timeout variable to wrap to a non-positive value, preventing the timeout check from firing and enabling idle or stalled connections to hold daemon slots indefinitely, leading to resource exhaustion.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
rsyncRsyncProject |
|
References
- GitHub Security Advisory (GHSA-j9wh-5jmp-2m64)vendor-advisory
- rsync 3.5.0 Release Notesrelease-notes
- https://www.vulncheck.com/advisories/rsync-signed-integer-overflow-via-msg-io-timeoutthird-party-advisory
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