CVE-2026-43619— Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| RsyncProject | rsync | < 3.4.3 | affected |
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I. Basic Information for CVE-2026-43619
Vulnerability Information
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Vulnerability Title
Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls
Source: NVD (National Vulnerability Database)
Vulnerability Description
Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| RsyncProject | rsync | 0 ~ 3.4.3 | - |
II. Public POCs for CVE-2026-43619
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · RsyncProject · 2026-05-20 · 6 CVEs total
| CVE-2026-43618 | 8.1 HIGH | Rsync < 3.4.3 Integer Overflow Information Disclosure |
| CVE-2026-29518 | 7.0 HIGH | Rsync < 3.4.3 TOCTOU Race Condition Allows Symlink-Based Arbitrary File Write |
| CVE-2026-43620 | 6.5 MEDIUM | Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files() |
| CVE-2026-43617 | 4.8 MEDIUM | Rsync < 3.4.3 Authorization Bypass via Hostname Resolution |
| CVE-2026-45232 | 3.1 LOW | Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy |
IV. Related Vulnerabilities
Same product: rsync
- CVE-2026-29518
Rsync < 3.4.3 TOCTOU Race Condition Allows Symlink-Based Arb - CVE-2026-43617
Rsync < 3.4.3 Authorization Bypass via Hostname Resolution - CVE-2026-43618
Rsync < 3.4.3 Integer Overflow Information Disclosure - CVE-2026-43620
Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files() - CVE-2026-45232
Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy
Same vendor: RsyncProject
- CVE-2026-29518
Rsync < 3.4.3 TOCTOU Race Condition Allows Symlink-Based Arb - CVE-2026-43617
Rsync < 3.4.3 Authorization Bypass via Hostname Resolution - CVE-2026-43618
Rsync < 3.4.3 Integer Overflow Information Disclosure - CVE-2026-43620
Rsync < 3.4.3 Out-of-Bounds Array Read via recv_files() - CVE-2026-45232
Rsync < 3.4.3 Off-by-One Stack Write via HTTP Proxy
V. Comments for CVE-2026-43619
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