CVE-2026-70462 — rsync 3.1.0 < 3.5.0 Signed Integer Overflow via MSG_IO_TIMEOUT
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 i…
Published: 2026-08-13 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7