CVE-2026-70462
mediumrsync 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 connec…
Vendor / product: Samba — rsync
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 disclosure@vulncheck.com
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-j9wh-5jmp-2m64 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/rsync-signed-integer-overflow-via-msg-io-timeout disclosure@vulncheck.com