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rsync before 3.5.0 contains a logic error in --max-alloc handling that allows a sender or configuration setting --max-alloc=0 to disable allocation sanity checks entirely rather than enforcing a zero-byte cap. Attackers can exploit this flaw to cause the receiver to attempt unbounded memory allocations for file list and data structures, potentially exhausting available memory and causing a denial of service.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade rsync | Sep 1, 2026 | Aug 13, 2026 |
| Amazon_linux_2023 | — | Upgrade rsyncUpgrade rsync-debugsourceUpgrade rsync-debuginfoUpgrade rsync-daemon | Sep 30, 2026 | Aug 13, 2026 |
| Debian | — | Upgrade rsync | Sep 30, 2026 | Aug 13, 2026 |
| Freebsd | — | Upgrade rsync | Aug 27, 2026 | Aug 25, 2026 |
| Redhat_linux | — | No solution exists | Aug 24, 2026 | Aug 13, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 15, 2026 | Aug 13, 2026 |
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