# CVE-2026-43619: Rsync < 3.4.3 Symlink Race Condition via Path-Based Syscalls

CVE-2026-43619 is fixed in 4 products on 1 platform, first by rsync 3.1.2-2.1ubuntu1.6+esm3, released May 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-43619
- Priority: Routine
- CVSS: 6.3 (Moderate)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 19, 2026
- Weakness: Time-of-check Time-of-use (TOCTOU) Race Condition
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43619

## 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'.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rsync Debian 12.15 (bookworm) | 3.2.7-1+deb12u5 | [DEBIAN-CVE-2026-43619](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43619.md) | May 27, 2026 |
| Linux | rsync Debian 13.5 (trixie) | 3.4.1+ds1-5+deb13u3 | [DEBIAN-CVE-2026-43619](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43619.md) | May 27, 2026 |
| Linux | rsync Debian 14 | 3.4.3+ds1-1 | [DEBIAN-CVE-2026-43619](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43619.md) | May 27, 2026 |
| Linux | rsync Ubuntu 18.04.6 LTS (bionic) | 3.1.2-2.1ubuntu1.6+esm3 | [rsync 3.1.2-2.1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-rsync-3.1.2-2.1ubuntu1.6-esm3.md) | May 19, 2026 |
| Linux | rsync Ubuntu 20.04 LTS (focal) | 3.1.3-8ubuntu0.9+esm1 | [rsync 3.1.3-8ubuntu0.9+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-rsync-3.1.3-8ubuntu0.9-esm1.md) | May 19, 2026 |
| Linux | rsync Ubuntu 22.04.1 LTS (jammy) | 3.2.7-0ubuntu0.22.04.6 | [rsync 3.2.7-0ubuntu0.22.04.6](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-rsync-3.2.7-0ubuntu0.22.04.6.md) | May 27, 2026 |
| Linux | rsync Ubuntu 24.04.5 LTS (noble) | 3.2.7-1ubuntu1.4 | [rsync 3.2.7-1ubuntu1.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-rsync-3.2.7-1ubuntu1.4.md) | May 27, 2026 |
| Linux | rsync Ubuntu 25.10 (questing) | 3.4.1+ds1-5ubuntu1.2 | [rsync 3.4.1+ds1-5ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-rsync-3.4.1-ds1-5ubuntu1.2.md) | May 27, 2026 |
| Linux | rsync Ubuntu 26.04.1 LTS (resolute) | 3.4.1+ds1-7ubuntu0.2 | [rsync 3.4.1+ds1-7ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-rsync-3.4.1-ds1-7ubuntu0.2.md) | May 19, 2026 |
| Linux | rsync amzn 2023 | 3.5.1-1.amzn2023.0.1 | [ALAS2023-2026-3131](https://patchblox.com/security/data/fix/linux/alas2023-2026-3131.md) | Sep 28, 2026 |
| Linux | rsync opensuse-leap 16.0 | 3.4.1-160000.6.1 | [OPENSUSE-SU-2026:21650-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21650-1.md) | Aug 26, 2026 |
| Linux | rsync sles 16.0 | 3.4.1-160000.6.1 | [SUSE-SU-2026:23323-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23323-1.md) | Aug 26, 2026 |
| Linux | rsync-daemon amzn 2023 | 3.5.1-1.amzn2023.0.1 | [ALAS2023-2026-3131](https://patchblox.com/security/data/fix/linux/alas2023-2026-3131.md) | Sep 28, 2026 |
| Linux | rsync-debuginfo amzn 2023 | 3.5.1-1.amzn2023.0.1 | [ALAS2023-2026-3131](https://patchblox.com/security/data/fix/linux/alas2023-2026-3131.md) | Sep 28, 2026 |
| Linux | rsync-debugsource amzn 2023 | 3.5.1-1.amzn2023.0.1 | [ALAS2023-2026-3131](https://patchblox.com/security/data/fix/linux/alas2023-2026-3131.md) | Sep 28, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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