Vulnerability-Lookup

CVE-2026-15812 (GCVE-0-2026-15812)

Vulnerability from cvelistv5 – Published: 2026-07-21 05:09 – Updated: 2026-07-22 14:20

Title

Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynamic links

Summary

A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities.

Severity

4.8 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

redhat

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-15812	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2500851	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-07-15 10:46

Credits

Red Hat would like to thank Fabio Di Nitto for reporting this issue.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-15812

Vulnerability from fkie_nvd - Published: 2026-07-21 06:16 - Updated: 2026-07-22 15:16

Severity

4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-15812
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2500851

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-36HW-MPC9-FW23

Vulnerability from github – Published: 2026-07-21 06:31 – Updated: 2026-07-21 06:31

Details

Severity

4.8 (Medium)


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

Show details on source website

JSON

To clipboard

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    "github_reviewed": false,
    "github_reviewed_at": null,
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  },
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  "id": "GHSA-36hw-mpc9-fw23",
  "modified": "2026-07-21T06:31:18Z",
  "published": "2026-07-21T06:31:18Z",
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    }
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}

ubuntu-cve-2026-15812

Vulnerability from osv_ubuntu

Published

2026-07-22 00:00

Modified

2026-07-22 00:00

Summary

Details

(A vulnerability was found in the internal Access Control List (ACL) su ...)

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-15812	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-15812	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libknet1",
            "binary_version": "1.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "kronosnet",
        "purl": "pkg:deb/ubuntu/kronosnet@1.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0-1",
        "1.0-1build1",
        "1.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libknet1",
            "binary_version": "1.15-1ubuntu1"
          },
          {
            "binary_name": "libnozzle1",
            "binary_version": "1.15-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "kronosnet",
        "purl": "pkg:deb/ubuntu/kronosnet@1.15-1ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8-2",
        "1.13-1",
        "1.14-1ubuntu2",
        "1.15-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libknet1",
            "binary_version": "1.23-2build1"
          },
          {
            "binary_name": "libnozzle1",
            "binary_version": "1.23-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "kronosnet",
        "purl": "pkg:deb/ubuntu/kronosnet@1.23-2build1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.20-4build1",
        "1.22-1",
        "1.23-2",
        "1.23-2build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libknet1t64",
            "binary_version": "1.28-2ubuntu2"
          },
          {
            "binary_name": "libnozzle1t64",
            "binary_version": "1.28-2ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "kronosnet",
        "purl": "pkg:deb/ubuntu/kronosnet@1.28-2ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.26-1",
        "1.28-1",
        "1.28-2ubuntu1",
        "1.28-2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libknet1t64",
            "binary_version": "1.33-1ubuntu1"
          },
          {
            "binary_name": "libnozzle1t64",
            "binary_version": "1.33-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "kronosnet",
        "purl": "pkg:deb/ubuntu/kronosnet@1.33-1ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.31-1ubuntu2",
        "1.32-1ubuntu1",
        "1.33-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "(A vulnerability was found in the internal Access Control List (ACL) su ...)",
  "id": "UBUNTU-CVE-2026-15812",
  "modified": "2026-07-22T00:00:00Z",
  "published": "2026-07-22T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-15812"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-15812"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-15812"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-15812 (GCVE-0-2026-15812)

FKIE_CVE-2026-15812

GHSA-36HW-MPC9-FW23

ubuntu-cve-2026-15812

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature