Ubuntu 26.04 LTS rsync Important Denial of Service Issues CVE-2025

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Several security issues were fixed in rsync. Software Description: - rsync: fast, versatile, remote (and local) file-copying tool Details: Calum Hutton discovered that rsync contained a heap-based out-of-bounds read when handling file transfers. A remote attacker with read access to an rsync server could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2025-10158) Batuhan Sancak, Damien Neil, and Michael Stapelberg discovered that rsync daemons configured without chroot protection were exposed to a race condition on parent path components. A local attacker with write access to a module could possibly use this issue to overwrite files, obtain sensitive information, or escalate privileges. (CVE-2026-29518) It was discovered that rsync did ...

The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS rsync 3.4.1+ds1-7ubuntu0.2 Ubuntu 25.10 rsync 3.4.1+ds1-5ubuntu1.2 Ubuntu 24.04 LTS rsync 3.2.7-1ubuntu1.4 Ubuntu 22.04 LTS rsync 3.2.7-0ubuntu0.22.04.6 In general, a standard system update will make all the necessary changes. After a standard system update you need to restart rsync daemons if configured to make all the necessary changes.

CVE-2025-10158, CVE-2026-29518, CVE-2026-41035, CVE-2026-43617,

CVE-2026-43618, CVE-2026-43619, CVE-2026-43620, CVE-2026-45232

Ubuntu Security Notice USN-8283-1

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