CVE-2026-53794rsync < 3.5.0 Denial of Service via --max-alloc=0 Logic Error
Updated under an hour ago ()
Does this affect you?
It affects RsyncProject rsync. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-1284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Undergoing Analysis
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
RsyncProject rsync rsyncproject:rsync (from the name) | through 3.4.4; 3.5.0 not affected | CNA record |
References
- https://github.com/RsyncProject/rsync/security/advisories/GHSA-p827-vwcp-m964vendor-advisory
- https://github.com/RsyncProject/rsync/releases/tag/v3.5.0release-notes
- https://www.vulncheck.com/advisories/rsync-denial-of-service-via-max-alloc-0-logic-errorthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.