CVE-2026-70459: CWE-908 Use of Uninitialized Resource in RsyncProject rsync
A null pointer dereference vulnerability exists in rsync versions 3.0.0 through 3.4.4 in the daemon child process. This occurs when the daemon receives a file list whose first entry is a dot entry not typed as a directory, causing the daemon to dereference an invalid pointer and crash the client connection. The vulnerability has a medium severity with a CVSS score of 6.9.
AI Analysis
Technical Summary
Rsync versions from 3.0.0 up to and including 3.4.4 contain a null pointer dereference vulnerability (CWE-908) in the daemon child process. The issue arises because the daemon assumes the first file list entry is a directory and dereferences it as such without verifying its type. If the first entry is a dot entry not typed as a directory, this leads to dereferencing an invalid or uninitialized pointer, causing the daemon to crash and terminate the client connection.
Potential Impact
Remote attackers can cause the rsync daemon to crash by sending a specially crafted file list with a first entry that is a dot entry not typed as a directory. This results in a denial of service by terminating the client connection. There is no indication of privilege escalation or code execution from this vulnerability.
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. Users should monitor vendor communications for updates and consider restricting access to the rsync daemon until a fix is available.
CVE-2026-70459: CWE-908 Use of Uninitialized Resource in RsyncProject rsync
Description
A null pointer dereference vulnerability exists in rsync versions 3.0.0 through 3.4.4 in the daemon child process. This occurs when the daemon receives a file list whose first entry is a dot entry not typed as a directory, causing the daemon to dereference an invalid pointer and crash the client connection. The vulnerability has a medium severity with a CVSS score of 6.9.
CVSS v4.0
Score 6.9medium
Affected software
RsyncProject
rsync
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Rsync versions from 3.0.0 up to and including 3.4.4 contain a null pointer dereference vulnerability (CWE-908) in the daemon child process. The issue arises because the daemon assumes the first file list entry is a directory and dereferences it as such without verifying its type. If the first entry is a dot entry not typed as a directory, this leads to dereferencing an invalid or uninitialized pointer, causing the daemon to crash and terminate the client connection.
Potential Impact
Remote attackers can cause the rsync daemon to crash by sending a specially crafted file list with a first entry that is a dot entry not typed as a directory. This results in a denial of service by terminating the client connection. There is no indication of privilege escalation or code execution from this vulnerability.
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. Users should monitor vendor communications for updates and consider restricting access to the rsync daemon until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-04T14:52:23.814Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7ddecabf8831d5395d0070
Added to database: 08/13/2026, 15:12:10 UTC
Last enriched: 08/21/2026, 13:26:06 UTC
Last updated: 09/26/2026, 01:47:43 UTC
Views: 49
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