RHSA-2026:26408HighCVSS 8.1

Red Hat Security Advisory: rsync security update

Published
June 16, 2026
Last Modified
August 14, 2026

🔗 CVE IDs covered (2)

CVE-2026-43618 →CVE-2026-29518 →

📋 Description

CVE-2026-29518 — rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot. CVE-2026-43618 — rsync: rsync: Remote memory disclosure via integer overflow in compressed-token decoding

🎯 Affected products15

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-0:3.1.3-27.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-0:3.1.3-27.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-0:3.1.3-27.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-0:3.1.3-27.el8_10.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-0:3.1.3-27.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-daemon-0:3.1.3-27.el8_10.noarch as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debuginfo-0:3.1.3-27.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debuginfo-0:3.1.3-27.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debuginfo-0:3.1.3-27.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debuginfo-0:3.1.3-27.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debugsource-0:3.1.3-27.el8_10.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debugsource-0:3.1.3-27.el8_10.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debugsource-0:3.1.3-27.el8_10.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • rsync-debugsource-0:3.1.3-27.el8_10.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To prevent exploitation, ensure the rsync daemon is configured with `use chroot = yes`. This setting, which is the default, isolates the rsync process and prevents the symlink race condition. If `use chroot = no` is present in the rsync configuration (e.g., `/etc/rsyncd.conf`), it must be changed to `use chroot = yes`. A restart of the rsync service is required for any configuration changes to take effect. Workaround: Disable compression on the rsync daemon by adding `refuse options = compress` to the `rsyncd.conf` file. A restart of the rsync daemon service is required for the change to take effect and may impact transfer performance.

🔗 References (5)