CVE-2026-70462: CWE-190 Integer Overflow or Wraparound in RsyncProject 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.
AI Analysis
Technical Summary
CVE-2026-70462 is a signed integer overflow vulnerability in rsync's I/O timeout mechanism affecting versions 3.1.0 through 3.4.4. Attackers can inject MSG_IO_TIMEOUT messages carrying non-positive values that cause the timeout variable to wrap to a non-positive number. This prevents the timeout checks from triggering, allowing connections to remain open indefinitely and potentially exhaust daemon resources.
Potential Impact
The vulnerability enables attackers to disable connection timeouts, allowing idle or stalled connections to persist indefinitely. This can lead to resource exhaustion on the rsync daemon, potentially degrading service availability or causing denial of service conditions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented.
CVE-2026-70462: CWE-190 Integer Overflow or Wraparound in RsyncProject rsync
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.
CVSS v4.0
Score 7.1high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70462 is a signed integer overflow vulnerability in rsync's I/O timeout mechanism affecting versions 3.1.0 through 3.4.4. Attackers can inject MSG_IO_TIMEOUT messages carrying non-positive values that cause the timeout variable to wrap to a non-positive number. This prevents the timeout checks from triggering, allowing connections to remain open indefinitely and potentially exhaust daemon resources.
Potential Impact
The vulnerability enables attackers to disable connection timeouts, allowing idle or stalled connections to persist indefinitely. This can lead to resource exhaustion on the rsync daemon, potentially degrading service availability or causing denial of service conditions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-04T14:52:23.815Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7ddecabf8831d5395d007f
Added to database: 08/13/2026, 15:12:10 UTC
Last enriched: 08/13/2026, 15:26:51 UTC
Last updated: 08/13/2026, 21:52:37 UTC
Views: 6
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