CVE-2026-53792— rsync < 3.5.0 Out-of-Bounds Read via Zero-Length Checksum Block
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 3.5.0之前版本存在安全漏洞，该漏洞源于发送方块匹配逻辑中的越界读取，恶意接收者通过发送长度为0的特制校验和块触发负偏移计算，导致发送方文件数据缓冲区内存越界读取。
Possible ATT&CK Techniques 1 AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RsyncProject | rsync | ≤ 3.4.4 |
affected |
3.5.0 |
unaffected |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-53792
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
rsync < 3.5.0 Out-of-Bounds Read via Zero-Length Checksum Block
Source: CVE Program / CVE List V5
Vulnerability Description
rsync before 3.5.0 contains an out-of-bounds read vulnerability in the sender-side block matching logic that allows a malicious receiver to trigger memory access before the start of an allocated buffer by sending a crafted checksum block with a length of zero. Attackers can send a specially crafted checksum set containing a zero-length block to cause a negative offset calculation during delta computation, resulting in an out-of-bounds read of file data buffer memory on the sender side.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
RsyncProject Rsync 输入验证错误漏洞
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 3.5.0之前版本存在安全漏洞，该漏洞源于发送方块匹配逻辑中的越界读取，恶意接收者通过发送长度为0的特制校验和块触发负偏移计算，导致发送方文件数据缓冲区内存越界读取。
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 | 0 ~ 3.4.4 | - |
|
II. Public POCs for CVE-2026-53792
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-53792
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-53792 (1)
Vendor Pages for CVE-2026-53792 (1)
-
🔗 Release v3.5.0 · RsyncProject/rsync · GitHub release-notes
Other References for CVE-2026-53792 (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-2026-70463 | 8.1 HIGH | rsync 3.1.0 < 3.5.0 Authorization Bypass via auth users Directive Parsing |
| CVE-2026-53790 | 8.1 HIGH | rsync < 3.5.0 Command Injection via Multiple Code Paths |
| CVE-2026-53795 | 8.1 HIGH | rsync < 3.5.0 Arbitrary File Write via --temp-dir/--link-dest |
| CVE-2026-70460 | 8.1 HIGH | rsync 2.3.3 < 3.5.0 Path Traversal via --partial-dir/--backup-dir Symlink |
| CVE-2026-53783 | 8.1 HIGH | rsync < 3.5.0 TOCTOU Race Condition Directory Escape via rrsync |
| 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-2026-70452 | 7.4 HIGH | rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure |
| CVE-2026-53793 | 7.4 HIGH | rsync < 3.5.0 Path Confinement Bypass via /./ Boundary Marker in Chroot Mode |
| CVE-2026-53802 | 7.1 HIGH | rsync < 3.5.0 Arbitrary File Read via Symlink Following |
| 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-2026-70462 | 6.5 MEDIUM | rsync 3.1.0 < 3.5.0 Signed Integer Overflow via MSG_IO_TIMEOUT |
Showing top 20 of 33 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: rsync
-
CVE-2026-70452
rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution -
CVE-2026-70453
rsync < 3.5.0 Algorithmic Complexity DoS via hash_search() -
CVE-2026-70454
rsync < 3.5.0 TLS Certificate Validation Bypass via SSL/Open -
CVE-2026-70455
rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Threa -
CVE-2026-70456
rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()
Same vendor: RsyncProject
-
CVE-2026-70452
rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution -
CVE-2026-70453
rsync < 3.5.0 Algorithmic Complexity DoS via hash_search() -
CVE-2026-70454
rsync < 3.5.0 TLS Certificate Validation Bypass via SSL/Open -
CVE-2026-70455
rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Threa -
CVE-2026-70456
rsync 3.0.1 < 3.5.0 Heap Out-of-Bounds Write via read_args()
V. Comments for CVE-2026-53792
No comments yet