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CVE-2026-70459— rsync 3.0.0 < 3.5.0 Daemon Crash via Malformed File List Entry

Quick assessment

Affected
RsyncProject rsync
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

RsyncProject Rsync是RsyncProject组织开源的一款速度快、功能极其强大的文件复制工具，可用于复制远程文件和本地文件。 RsyncProject Rsync 3.0.0至3.5.0之前版本存在资源管理错误漏洞，该漏洞源于守护进程子进程未验证文件列表第一个条目类型便将其作为目录结构指针解引用，导致无效或未初始化的指针解引用，远程攻击者可通过发送特制文件列表使守护进程崩溃，造成拒绝服务。

CVSS 5.3 · Medium EPSS 0.72% · P52

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
RsyncProject rsync 3.0.0≤ 3.4.4 affected
3.5.0 unaffected
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I. Basic Information for CVE-2026-70459

Vulnerability Information
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Vulnerability Title
rsync 3.0.0 < 3.5.0 Daemon Crash via Malformed File List Entry
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对未经初始化资源的使用
Source: CVE Program / CVE List V5
Vulnerability Title
RsyncProject Rsync 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RsyncProject Rsync是RsyncProject组织开源的一款速度快、功能极其强大的文件复制工具，可用于复制远程文件和本地文件。 RsyncProject Rsync 3.0.0至3.5.0之前版本存在资源管理错误漏洞，该漏洞源于守护进程子进程未验证文件列表第一个条目类型便将其作为目录结构指针解引用，导致无效或未初始化的指针解引用，远程攻击者可通过发送特制文件列表使守护进程崩溃，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
RsyncProject rsync 3.0.0 ~ 3.4.4 -

II. Public POCs for CVE-2026-70459

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III. Intelligence Information for CVE-2026-70459

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Vendor Advisories for CVE-2026-70459 (2)

Vendor Pages for CVE-2026-70459 (1)

Same Patch Batch · RsyncProject · 2026-08-13 · 33 CVEs total

CVE-2026-53791 9.1 CRITICAL rsync < 3.5.0 Daemon IP Spoofing via PROXY Protocol Header
CVE-2026-70461 8.2 HIGH rsync 3.2.5 < 3.5.0 Heap Out-of-Bounds Write via files-from Entry
CVE-2026-70456 8.2 HIGH rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()
CVE-2026-70458 8.2 HIGH rsync 3.0.0 < 3.5.0 Out-of-Bounds Write via FLAG_HLINKED Handling
CVE-2026-53790 8.1 HIGH rsync < 3.5.0 Command Injection via Multiple Code Paths
CVE-2026-70463 8.1 HIGH rsync 3.1.0 < 3.5.0 Authorization Bypass via auth users Directive Parsing
CVE-2026-53795 8.1 HIGH rsync < 3.5.0 Arbitrary File Write via --temp-dir/--link-dest
CVE-2026-53783 8.1 HIGH rsync < 3.5.0 TOCTOU Race Condition Directory Escape via rrsync
CVE-2026-70460 8.1 HIGH rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink
CVE-2026-70454 8.0 HIGH rsync < 3.5.0 TLS Certificate Validation Bypass via SSL/OpenSSL Mode
CVE-2026-53803 7.8 HIGH rsync < 3.5.0 Symlink Following Arbitrary File Overwrite
CVE-2026-70455 7.5 HIGH rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion
CVE-2026-70464 7.5 HIGH rsync 2.0.0 < 3.5.0 Connection Slot Exhaustion DoS via Handshake Stall
CVE-2026-70453 7.5 HIGH rsync < 3.5.0 Algorithmic Complexity DoS via hash_search()
CVE-2026-53793 7.4 HIGH rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode
CVE-2026-70452 7.4 HIGH rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
CVE-2026-53784 7.1 HIGH rsync < 3.5.0 Path Traversal via Symlink Module Root
CVE-2026-53785 7.1 HIGH rsync < 3.5.0 Path Traversal Write Escape via --relative Mode
CVE-2026-53802 7.1 HIGH rsync < 3.5.0 Arbitrary File Read via Symlink Following
CVE-2026-53789 6.5 MEDIUM rsync < 3.5.0 Arbitrary File Deletion via Malicious File List

Showing top 20 of 33 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: rsync
Same vendor: RsyncProject
Same weakness: CWE-908

V. Comments for CVE-2026-70459

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