CVE-2025-10158VulnerabilityPublished 2 Apr 2026Updated 5 Nov 2026

Red Hat Security Advisory: rsync security update

Affects Red Hat rsyncSource GCVE Database

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Not known to be exploited.

Data as of 5 Nov 2026, 16:03 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Red Hat has released updated rsync packages for Red Hat Enterprise Linux 8 to address this vulnerability. Users should apply the security update as detailed in the Red Hat advisory (RHSA-2026:6436) and the referenced article https://access.redhat.com/articles/11258 to remediate the issue. No additional mitigation steps are indicated beyond applying the official patch.

Description

A moderate severity vulnerability (CVE-2025-10158) in the rsync utility allows out-of-bounds array access via a negative index. Rsync is widely used for copying and synchronizing files locally or over networks by sending only file differences. This flaw could potentially lead to memory corruption or crashes. Red Hat has issued security updates for multiple Red Hat Enterprise Linux 8 variants to address this issue.

Impact

The vulnerability allows out-of-bounds array access which may lead to memory corruption or application crashes when using the rsync utility. This could disrupt file synchronization operations or potentially be leveraged for further exploitation depending on context. The advisory rates the impact as moderate.

Summary

The rsync utility contains a security flaw identified as CVE-2025-10158, involving an out-of-bounds array access triggered by a negative index. This vulnerability affects Red Hat Enterprise Linux 8 across various architectures including x86_64, s390x, ppc64le, and aarch64. The issue was rated as moderate severity by Red Hat Product Security. The flaw could cause unexpected behavior such as memory corruption or denial of service. Red Hat has released updated rsync packages (version 3.1.3-24.el8_10) to fix this vulnerability.

CWE-129Improper Validation of Array Index (opens in a new tab)
Variant weaknessLikelihood of exploit: HighOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
Architecture and Design · Input Validation
Use an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks…
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
Injection Prevention (opens in a new tab)
SQL Injection Prevention (opens in a new tab)
Injection Prevention in Java (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Overflow Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 5 Nov 2026, 16:03 UTC

WeaknessesCWE-129

Technical details

References

Community reviews

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