CVE-2026-53794
published 2026-08-13CVE-2026-53794: 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…
PriorityP429medium5.3CVSS 3.1
AVNACLPRNUINSUCNINAL
EPSS
0.37%
30.5th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rsyncproject | rsync | <= 3.4.4 | — |
| samba | rsync | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
nvdv4.06.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat5.3MEDIUM
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Bugzilla
CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error [fedora-all]
bugzilla·2026-08-21·CVSS 5.3
CVE-2026-53794 [MEDIUM] CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error [fedora-all]
CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Discussion:
FEDORA-2026-bfae8723e2 (rsync-3.5.0-1.fc44) has been submi
Bugzilla
CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error
bugzilla·2026-08-13·CVSS 5.3
CVE-2026-53794 [MEDIUM] CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error
CVE-2026-53794 rsync: rsync: Denial of Service via --max-alloc=0 logic error
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.
2026-08-13
Published