CVE-2025-10158VulnerabilityPublished 26 May 2026Updated 9 Oct 2026

Red Hat Security Advisory: rsync security update

Affects Red Hat rsyncSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited.

Data as of 30 Oct 2026, 06:59 UTC

Severity

High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

Disclosed: evidence found.
CVE published 26 May 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 29 Oct 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

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected Red Hat Red Hat Enterprise Linux Red Hat Enterprise Linux AppStream EUS (v. 10.0) Red Hat Enterprise Linux BaseOS EUS (v. 10.0) noarch SUSE aarch64 rsync-3.4.1-160000.4.1.aarch64 ppc64le rsync-3.4.1-160000.4.1.ppc64le	Fixed in–

AI-suggested

Red Hat has released updated rsync packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 10.0 Extended Update Support should apply the security update rsync-3.4.1-2.el10_0.2 or later as provided by Red Hat. Refer to the Red Hat advisory RHSA-2026:20696 and the article https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigation steps are indicated by the vendor.

Description

This update for rsync fixes the following issues - CVE-2025-10158: Out of bounds array access via negative index (bsc#1254441). - CVE-2026-29518: Symlink-Race TOCTOU in Daemon (use chroot = no) (bsc#1264511). - CVE-2026-41035: count of entries mismatch can lead to a use-after-free (bsc#1262223). - CVE-2026-43617: Authorization Bypass via Hostname Resolution (bsc#1264515). - CVE-2026-43618: Integer Overflow Information Disclosure (bsc#1264512). - CVE-2026-43619: Symlink Race Condition via Path-Based Syscalls (bsc#1264514). - CVE-2026-43620: Out-of-Bounds Array Read via recv_files() (bsc#1264513). - CVE-2026-45232: Off-by-one stack OOB write in HTTP CONNECT proxy response parsing (bsc#1265296).

Impact

The vulnerabilities could allow an attacker to cause out-of-bounds memory access or use-after-free conditions in the rsync utility, potentially leading to crashes or memory corruption. This could affect the reliability and security of systems using rsync for file synchronization or mirroring. No known exploits in the wild have been reported at this time.

Summary

The rsync utility in Red Hat Enterprise Linux 10.0 Extended Update Support contains two security vulnerabilities: CVE-2025-10158, an out-of-bounds array access via a negative index, and CVE-2026-41035, a use-after-free vulnerability in extended attribute handling. These vulnerabilities could lead to memory corruption or other unintended behavior. Red Hat has issued security advisories and updated packages (rsync-3.4.1-2.el10_0.2) to fix these issues across multiple architectures including x86_64, s390x, ppc64le, and aarch64. The advisory rates the impact as Important and provides instructions for applying the update. No CVSS score is provided in the advisory.

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).
CWE-805Buffer Access with Incorrect Length Value (opens in a new tab)
Base weaknessLikelihood of exploit: High
The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (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)
SOAP Array Overflow (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

Affected software

Description

AI analysisMachine-generated, updated 10 Jul 2026, 12:57 UTC

WeaknessesCWE-129, CWE-805

Technical details

References

Community reviews

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