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Vulnerabilities

Vulnerability · CVE-2026-70464

rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake

Published Aug 13, 2026 · catalog updated Nov 4, 2026 · rsync daemon 2.0.0 before

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-70464. EPSS is 0.64%. Act only if a listed version of rsync daemon 2.0.0 before is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (rsync daemon 2.0.0 before).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.64%
Remediation
Advisory link
Affected products
Alpine:v3.21 rsync · Alpine:v3.22 rsync · Alpine:v3.23 rsync · Alpine:v3.24 rsync

rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake process before or after module selection without triggering the I/O timeout. Attackers can open many simultaneous connections and trickle data at the minimum rate to avoid timeout, or stall entirely before module selection where no timeout applies, consuming all available connection slots and denying service to legitimate clients.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.21 rsync2.0.0 → 3.5.0-r0
  • Alpine:v3.22 rsync2.0.0 → 3.5.0-r0
  • Alpine:v3.23 rsync2.0.0 → 3.5.0-r0
  • Alpine:v3.24 rsync2.0.0 → 3.5.0-r0

How to fix CVE-2026-70464

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-70464. EPSS is 0.64%. Act only if a listed version of rsync daemon 2.0.0 before is installed.

Which versions are affected?

Compare what you have installed with 2.0.0 → 3.5.0-r0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 13, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake process before or after module selection without triggering the I/O timeout. Attackers can open many simultaneous connections and trickle data at the minimum rate to avoid timeout, or stall entirely before module select

  2. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    rsync fixed in 3.5.0-r0; rsync fixed in 3.5.0-r0; rsync fixed in 3.5.0-r0; rsync fixed in 3.5.0-r0

  3. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    rsync fixed in 3.5.0-r0

  4. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake process before or after module selection without triggering the I/O timeout. Attackers can open many simultaneous connections and trickle data at the minimum rate to avoid timeout, or stall entirely before module select

Sources

  • CVE.orgVulnerability recordCVE-2026-70464

    Official CVE identifier

    cve.org
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2026-70464
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2026-70464

    rsync daemon 2.0.0 before 3.5.0 contains a denial of service vulnerability that allows unauthenticated remote attackers to exhaust daemon connection slots by stalling the handshake process before or after module selection without triggering the I/O timeout. Attackers can open man

    osv.dev

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Trivy Vulnerability DBNov 4, 2026
  • OpenSSF OSV / OSV ScannerNov 4, 2026