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rsync EUVDEUVD-2026-58042

| CVE-2026-70462 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-08-13 VulnCheck
Integer Overflow Denial Of Service Rsync Suse
7.1
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
7.1 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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
vuln.today AI
6.5 MEDIUM

Network-reachable attack with no privileges required; UI:R because an active rsync session must be in progress; impact is purely availability via indefinite slot exhaustion.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Aug 13, 2026 - 15:40 vuln.today
Analysis Generated
Aug 13, 2026 - 15:40 vuln.today
CVE Published
Aug 13, 2026 - 14:42 cve.org
HIGH 7.1

DescriptionCVE.org

rsync 3.1.0 before 3.5.0 contains a signed integer overflow vulnerability in the I/O timeout implementation that allows attackers to permanently disable connection timeouts by injecting MSG_IO_TIMEOUT messages carrying non-positive (zero or negative) values. Attackers can craft malicious MSG_IO_TIMEOUT messages that cause the timeout variable to wrap to a non-positive value, preventing the timeout check from firing and enabling idle or stalled connections to hold daemon slots indefinitely, leading to resource exhaustion.

AnalysisAI

Signed integer overflow in rsync 3.1.0 through 3.4.x allows network-accessible attackers to permanently disable connection timeouts on a daemon by injecting crafted MSG_IO_TIMEOUT messages carrying zero or negative values, ultimately enabling resource exhaustion via indefinitely held daemon slots. All deployments running the rsync daemon in the affected range are exposed; the fix is confirmed in rsync 3.5.0, released as a major security update. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Identify network-exposed rsync daemon
Delivery
Initiate rsync protocol session
Exploit
Inject crafted MSG_IO_TIMEOUT with non-positive value
Install
Trigger signed integer overflow in timeout variable
C2
Timeout check permanently suppressed for session
Execute
Hold stalled connection slot indefinitely
Impact
Repeat across slots to exhaust daemon connection pool
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Vulnerability AssessmentAI

Exploitation The rsync daemon (rsyncd) must be running in network-accessible mode, typically on TCP port 873. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 7.1 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) accurately reflects a network-reachable, low-complexity denial-of-service with no confidentiality or integrity consequences. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with network access to an exposed rsync daemon on port 873 initiates an rsync session and, during the protocol handshake or data transfer phase, injects a crafted MSG_IO_TIMEOUT message carrying a zero or negative integer value. The daemon's signed integer overflow causes the timeout variable to become non-positive, permanently suppressing the connection timeout check for that slot. …
Remediation Upgrade to rsync 3.5.0 immediately; this is confirmed as a major security release by the vendor at https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 and directly addresses this vulnerability per the advisory at https://github.com/RsyncProject/rsync/security/advisories/GHSA-j9wh-5jmp-2m64. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Immediately inventory all rsync daemon installations and identify any running versions 3.1.0 through 3.4.x, prioritizing internet-facing instances (complete within 24 hours). …

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Same weakness CWE-190 – Integer Overflow or Wraparound

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Same technique Integer Overflow

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CVE-2014-0497 CRITICAL POC
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected
SUSE Linux Enterprise Micro 5.3 Affected

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EUVD-2026-58042 vulnerability details – vuln.today
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