CVE-2026-70462: CWE-190 Integer Overflow or Wraparound in RsyncProject rsync
Rsync versions 3.1.0 through 3.4.4 contain a signed integer overflow vulnerability in the I/O timeout implementation. This flaw allows attackers to send crafted MSG_IO_TIMEOUT messages with zero or negative values, causing the timeout variable to wrap and disable connection timeouts. As a result, idle or stalled connections can persist indefinitely, potentially exhausting daemon resources.
AI Analysis
Technical Summary
CVE-2026-70462 is a signed integer overflow vulnerability in rsync's I/O timeout handling present in versions 3.1.0 up to and including 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 mechanism from triggering, allowing idle or stalled connections to remain open indefinitely and consume daemon slots, leading to resource exhaustion.
Potential Impact
The vulnerability enables attackers to disable connection timeouts by exploiting an integer overflow, which can cause rsync daemon slots to be held indefinitely by idle or stalled connections. This can lead to resource exhaustion on the server, 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. Until a fix is available, administrators should monitor connection usage and consider limiting the number of concurrent connections or implementing external timeout controls to mitigate resource exhaustion risks.
CVE-2026-70462: CWE-190 Integer Overflow or Wraparound in RsyncProject rsync
Description
Rsync versions 3.1.0 through 3.4.4 contain a signed integer overflow vulnerability in the I/O timeout implementation. This flaw allows attackers to send crafted MSG_IO_TIMEOUT messages with zero or negative values, causing the timeout variable to wrap and disable connection timeouts. As a result, idle or stalled connections can persist indefinitely, potentially exhausting daemon resources.
CVSS v4.0
Score 7.1high
Affected software
RsyncProject
rsync
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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 handling present in versions 3.1.0 up to and including 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 mechanism from triggering, allowing idle or stalled connections to remain open indefinitely and consume daemon slots, leading to resource exhaustion.
Potential Impact
The vulnerability enables attackers to disable connection timeouts by exploiting an integer overflow, which can cause rsync daemon slots to be held indefinitely by idle or stalled connections. This can lead to resource exhaustion on the server, 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. Until a fix is available, administrators should monitor connection usage and consider limiting the number of concurrent connections or implementing external timeout controls to mitigate resource exhaustion risks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-04T14:52:23.815Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7ddecabf8831d5395d007f
Added to database: 08/13/2026, 15:12:10 UTC
Last enriched: 08/21/2026, 13:42:15 UTC
Last updated: 09/28/2026, 20:11:56 UTC
Views: 65
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