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'.

How to fix CVE-2026-43619

To remediate CVE-2026-43619, upgrade the affected package to a fixed version below.

• —upgrade to 3.4.3-r0 or later
• —upgrade to 3.2.3-4+deb11u4 or later

Is CVE-2026-43619 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 3.4.3-r0
• from 0, < 3.2.3-4+deb11u4

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2026-43619
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-43619