CVE-2026-70459: CWE-908 Use of Uninitialized Resource in RsyncProject rsync
rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The daemon dereferences the first file list entry as a directory structure pointer without verifying the entry type, resulting in an invalid or uninitialized pointer dereference that terminates the client connection.
AI Analysis
Technical Summary
CVE-2026-70459 is a vulnerability in rsync versions 3.0.0 up to and including 3.4.4 where the daemon child process dereferences an uninitialized or invalid pointer. This happens when the first entry in a file list sent by a remote attacker is a dot entry not typed as a directory. The daemon assumes the entry is a directory and dereferences it without validation, leading to a null pointer dereference and daemon crash.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by crashing the rsync daemon, terminating client connections. There is no indication of code execution or data corruption from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider restricting access to the rsync daemon to trusted clients to reduce exposure.
CVE-2026-70459: CWE-908 Use of Uninitialized Resource in RsyncProject rsync
Description
rsync 3.0.0 before 3.5.0 contains a null pointer dereference vulnerability in the daemon child process that allows remote attackers to crash the daemon by sending a file list whose first entry is a dot entry not typed as a directory. The daemon dereferences the first file list entry as a directory structure pointer without verifying the entry type, resulting in an invalid or uninitialized pointer dereference that terminates the client connection.
CVSS v4.0
Score 6.9medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70459 is a vulnerability in rsync versions 3.0.0 up to and including 3.4.4 where the daemon child process dereferences an uninitialized or invalid pointer. This happens when the first entry in a file list sent by a remote attacker is a dot entry not typed as a directory. The daemon assumes the entry is a directory and dereferences it without validation, leading to a null pointer dereference and daemon crash.
Potential Impact
The vulnerability allows remote attackers to cause a denial of service by crashing the rsync daemon, terminating client connections. There is no indication of code execution or data corruption from the provided information.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider restricting access to the rsync daemon to trusted clients to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-04T14:52:23.814Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7ddecabf8831d5395d0070
Added to database: 08/13/2026, 15:12:10 UTC
Last enriched: 08/13/2026, 15:29:02 UTC
Last updated: 08/13/2026, 22:04:32 UTC
Views: 5
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