Vulnerability-Lookup

RHSA-2026:20604

Vulnerability from csaf_redhat - Published: 2026-05-26 05:23 - Updated: 2026-05-26 14:21

Summary

Red Hat Security Advisory: rsync security update

Severity

Important

Notes

Topic: An update for rsync is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: The rsync utility enables the users to copy and synchronize files locally or across a network. Synchronization with rsync is fast because rsync only sends the differences in files over the network instead of sending whole files. The rsync utility is also used as a mirroring tool. Security Fix(es): * rsync: Rsync: Out of bounds array access via negative index (CVE-2025-10158) * rsync: Rsync: Use-after-free vulnerability in extended attribute handling (CVE-2026-41035) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-10158

An out of bounds read flaw has been discovered in rsync. A malicious client acting as the receiver of an rsync file transfer can trigger an OOB read via a negative array index. The rsync client requires at least read access to the remote rsync module to trigger the issue.

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE-129 - Improper Validation of Array Index

Affected products

Fixed 12 products

Product	Version	Remediation
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-daemon-0:3.2.3-19.el9_4.3.noarch	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.src	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-daemon-0:3.2.3-19.el9_4.3.noarch	—	Vendor Fix fix Workaround

Known not affected 16 products

Product	Version	Remediation
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.x86_64	—	Workaround

Threats

Impact Moderate

CVE-2026-41035

A flaw was found in rsync. When rsync is configured to handle extended attributes (using the -X or --xattrs option), a remote attacker can exploit a use-after-free vulnerability. This occurs because the receive_xattr function incorrectly processes an untrusted length value during a sorting operation, leading to memory corruption. Successful exploitation can result in a denial of service, causing the rsync process to crash, and may potentially allow for arbitrary code execution.

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

CWE-805 - Buffer Access with Incorrect Length Value

Affected products

Fixed 12 products

Product	Version	Remediation
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-daemon-0:3.2.3-19.el9_4.3.noarch	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.src	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-0:3.2.3-19.el9_4.3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-daemon-0:3.2.3-19.el9_4.3.noarch	—	Vendor Fix fix Workaround

Known not affected 16 products

Product	Version	Remediation
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: AppStream-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debuginfo-0:3.2.3-19.el9_4.3.x86_64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.aarch64	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.ppc64le	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.s390x	—	Workaround
Unresolved product id: BaseOS-9.4.0.Z.EUS:rsync-debugsource-0:3.2.3-19.el9_4.3.x86_64	—	Workaround

Threats

Impact Important

References

18 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:20604	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2415637	external
https://bugzilla.redhat.com/show_bug.cgi?id=2458898	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2025-10158	self
https://bugzilla.redhat.com/show_bug.cgi?id=2415637	external
https://www.cve.org/CVERecord?id=CVE-2025-10158	external
https://nvd.nist.gov/vuln/detail/CVE-2025-10158	external
https://attackerkb.com/assessments/fbacb2a6-d1cd-…	external
https://github.com/RsyncProject/rsync/commit/797e…	external
https://access.redhat.com/security/cve/CVE-2026-41035	self
https://bugzilla.redhat.com/show_bug.cgi?id=2458898	external
https://www.cve.org/CVERecord?id=CVE-2026-41035	external
https://nvd.nist.gov/vuln/detail/CVE-2026-41035	external
https://github.com/RsyncProject/rsync/issues/871	external
https://github.com/RsyncProject/rsync/releases	external
https://www.openwall.com/lists/oss-security/2026/…	external

JSON

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          "text": "An out of bounds read flaw has been discovered in rsync. A malicious client acting as the receiver of an rsync file transfer can trigger an OOB read via a negative array index. The rsync client requires at least read access to the remote rsync module to trigger the issue.",
          "title": "Vulnerability description"
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          "text": "rsync: Rsync: Out of bounds array access via negative index",
          "title": "Vulnerability summary"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "title": "Statement"
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}

CVE-2025-10158 (GCVE-0-2025-10158)

Vulnerability from cvelistv5 – Published: 2025-11-18 14:24 – Updated: 2025-11-19 16:48

Title

Rsync: Out of bounds array access via negative index

Summary

A malicious client acting as the receiver of an rsync file transfer can trigger an out of bounds read of a heap based buffer, via a negative array index. The malicious rsync client requires at least read access to the remote rsync module in order to trigger the issue.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-129 - Improper Validation of Array Index

Assigner

rapid7

References

2 references

URL	Tags
https://github.com/RsyncProject/rsync/commit/797e…	patch
https://attackerkb.com/assessments/fbacb2a6-d1cd-…	technical-description

Impacted products

1 product

Vendor	Product	Version
rsync	rsync	Affected: 0 , ≤ 3.4.1 (semver)

Date Public

2025-11-18 14:20

Credits

Calum Hutton

Show details on NVD website

JSON

To clipboard

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CVE-2026-41035 (GCVE-0-2026-41035)

Vulnerability from cvelistv5 – Published: 2026-04-16 06:53 – Updated: 2026-04-22 03:03

Summary

In rsync 3.0.1 through 3.4.1, receive_xattr relies on an untrusted length value during a qsort call, leading to a receiver use-after-free. The victim must run rsync with -X (aka --xattrs). On Linux, many (but not all) common configurations are vulnerable. Non-Linux platforms are more widely vulnerable.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

CWE

CWE-130 - Improper Handling of Length Parameter Inconsistency

Assigner

mitre

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://github.com/RsyncProject/rsync/releases
https://github.com/RsyncProject/rsync/issues/871

Impacted products

1 product

Vendor	Product	Version
Samba	rsync	Affected: 3.0.1 , ≤ 3.4.1 (semver)

Show details on NVD website

JSON

To clipboard

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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-41035",
    "datePublished": "2026-04-16T06:53:05.237Z",
    "dateReserved": "2026-04-16T06:53:04.777Z",
    "dateUpdated": "2026-04-22T03:03:52.565Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:20604

CVE-2025-10158 (GCVE-0-2025-10158)

CVE-2026-41035 (GCVE-0-2026-41035)

Tags

Sightings

Nomenclature