Vulnerability-Lookup

alsa-2026:6390

Vulnerability from osv_almalinux

Published

2026-04-01 00:00

Modified

2026-04-02 09:23

Summary

Moderate: rsync security update

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)

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.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:6390	ADVISORY
	https://access.redhat.com/security/cve/CVE-2025-10158	REPORT
	https://bugzilla.redhat.com/2415637	REPORT
	https://errata.almalinux.org/9/ALSA-2026-6390.html	ADVISORY

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "rsync"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.5-3.el9_7.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "rsync-daemon"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.5-3.el9_7.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:9",
        "name": "rsync-rrsync"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.2.5-3.el9_7.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "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.  \n\nSecurity Fix(es):  \n\n  * rsync: Rsync: Out of bounds array access via negative index (CVE-2025-10158)\n\n\nFor 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.\n",
  "id": "ALSA-2026:6390",
  "modified": "2026-04-02T09:23:33Z",
  "published": "2026-04-01T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:6390"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-10158"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2415637"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2026-6390.html"
    }
  ],
  "related": [
    "CVE-2025-10158"
  ],
  "summary": "Moderate: rsync security update"
}

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

URL

Tags

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

Impacted products

	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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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-10158",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-19T16:15:02.998218Z",
                "version": "2.0.3"
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            }
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      "credits": [
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        }
      ],
      "datePublic": "2025-11-18T14:20:00.000Z",
      "descriptions": [
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          "supportingMedia": [
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              "type": "text/html",
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            }
          ],
          "value": "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 \n\nmalicious \n\nrsync client requires at least read access to the remote rsync module in order to trigger the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
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          },
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          "url": "https://github.com/RsyncProject/rsync/commit/797e17fc4a6f15e3b1756538a9f812b63942686f"
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      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2025-03-19T06:11:00.000Z",
          "value": "Rapid7 makes initial outreach to rsync maintainers"
        },
        {
          "lang": "en",
          "time": "2025-03-19T10:04:00.000Z",
          "value": "Rsync maintainers confirm outreach"
        },
        {
          "lang": "en",
          "time": "2025-03-20T10:34:00.000Z",
          "value": "Rapid7 provides rsync maintainers a technical writeup and PoC to reproduce the issue"
        },
        {
          "lang": "en",
          "time": "2025-04-02T03:05:00.000Z",
          "value": "Rapid7 requests confirmation of findings"
        },
        {
          "lang": "en",
          "time": "2025-04-06T09:30:00.000Z",
          "value": "Rsync maintainers indicate more time is needed"
        },
        {
          "lang": "en",
          "time": "2025-04-16T05:31:00.000Z",
          "value": "Rsync maintainers reproduce the issue and dispute its security impact due to uncertainty around viability of heap manipulation during exploitation"
        },
        {
          "lang": "en",
          "time": "2025-04-17T01:56:00.000Z",
          "value": "Rapid7 indicates manipulating the heap is nuanced and CVE assignment is both prudent and best practice in this instance"
        },
        {
          "lang": "en",
          "time": "2025-05-07T09:08:00.000Z",
          "value": "Rapid7 requests an update"
        },
        {
          "lang": "en",
          "time": "2025-05-12T06:08:00.000Z",
          "value": "Rsync maintainers indicate a pull request to fix the issue is forthcoming"
        },
        {
          "lang": "en",
          "time": "2025-05-28T09:40:00.000Z",
          "value": "Rapid7 requests an update"
        },
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          "lang": "en",
          "time": "2025-06-17T04:19:00.000Z",
          "value": "Rapid7 requests an update"
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          "lang": "en",
          "time": "2025-08-18T11:59:00.000Z",
          "value": "Rapid7 requests an update"
        },
        {
          "lang": "en",
          "time": "2025-08-23T09:17:00.000Z",
          "value": "Rsync maintainers indicate a pull request to remediate the issue has been made and a feature release is forthcoming"
        },
        {
          "lang": "en",
          "time": "2025-09-02T04:23:00.000Z",
          "value": "Rapid7 indicates intention to assign a CVE and perform a coordinated disclosure with the rsync maintainers upon the upcoming feature release"
        },
        {
          "lang": "en",
          "time": "2025-09-09T11:18:00.000Z",
          "value": "Rapid7 provides rsync maintainers a reserved CVE identifier and requests the date for the expected feature release"
        },
        {
          "lang": "en",
          "time": "2025-11-11T04:42:00.000Z",
          "value": "Rapid7 indicates intention to publish the CVE record on November 18, 2025."
        },
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          "lang": "en",
          "time": "2025-11-18T14:00:00.000Z",
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    "dateReserved": "2025-09-09T11:15:17.585Z",
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    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

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