Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-p827-vwcp-m964
- https://www.vulncheck.com/advisories/rsync-denial-of-service-via-max-alloc-0-log
FAQ
What is CVE-2026-53794?
CVE-2026-53794 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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-...
How severe is CVE-2026-53794?
CVE-2026-53794 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-53794?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.