Vulnerability-Lookup

RHBA-2026:28238

Vulnerability from csaf_redhat - Published: 2026-06-23 15:39 - Updated: 2026-07-30 09:27

Summary

Red Hat Bug Fix Advisory: firewalld bug fix and enhancement update

Severity

Moderate

Notes

Topic: An update for firewalld is now available for Red Hat Enterprise Linux 10.

Details: firewalld is a firewall service daemon that provides a dynamic customizable firewall with a D-Bus interface. Bug Fix(es) and Enhancement(s): * firewalld: package upgrade may cause running firewalld to reports errors (JIRA:RHEL-137602) * [10.3] Firewalld rebase to latest upstream stable (JIRA:RHEL-174658) * Firewalld --timeout argument does not work for policies (JIRA:RHEL-95705)

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-2026-4948

A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

5.5 (Medium)


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

CWE-279 - Incorrect Execution-Assigned Permissions

Affected products

Fixed 6 products

Product	Version	Remediation
Unresolved product id: AppStream-10.2.Z:firewall-applet-0:2.4.2-1.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.2.Z:firewall-config-0:2.4.2-1.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-10.2.Z:firewalld-0:2.4.2-1.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-10.2.Z:firewalld-0:2.4.2-1.el10_2.src	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-10.2.Z:firewalld-filesystem-0:2.4.2-1.el10_2.noarch	—	Vendor Fix fix Workaround
Unresolved product id: BaseOS-10.2.Z:python3-firewall-0:2.4.2-1.el10_2.noarch	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHBA-2026:28238	self
https://issues.redhat.com/browse/RHEL-137602	external
https://issues.redhat.com/browse/RHEL-174658	external
https://issues.redhat.com/browse/RHEL-95705	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-4948	self
https://bugzilla.redhat.com/show_bug.cgi?id=2452086	external
https://www.cve.org/CVERecord?id=CVE-2026-4948	external
https://nvd.nist.gov/vuln/detail/CVE-2026-4948	external

Acknowledgments

Asim Viladi Oglu Manizada

JSON

To clipboard

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        "text": "firewalld is a firewall service daemon that provides a dynamic customizable firewall with a D-Bus interface.\n\nBug Fix(es) and Enhancement(s):\n\n* firewalld: package upgrade may cause running firewalld to reports errors (JIRA:RHEL-137602)\n\n* [10.3] Firewalld rebase to latest upstream stable (JIRA:RHEL-174658)\n\n* Firewalld --timeout argument does not work for policies (JIRA:RHEL-95705)",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Asim Viladi Oglu Manizada"
          ]
        }
      ],
      "cve": "CVE-2026-4948",
      "cwe": {
        "id": "CWE-279",
        "name": "Incorrect Execution-Assigned Permissions"
      },
      "discovery_date": "2026-03-27T04:44:51.806000+00:00",
      "ids": [
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          "text": "2452086"
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          "text": "A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.",
          "title": "Vulnerability description"
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          "title": "CVSS score applicability"
        }
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        {
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4948"
        }
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      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-23T15:39:13+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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            "BaseOS-10.2.Z:firewalld-filesystem-0:2.4.2-1.el10_2.noarch",
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          },
          "url": "https://access.redhat.com/errata/RHBA-2026:28238"
        },
        {
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          "details": "To mitigate this issue, ensure that the firewalld desktop policy is not active on systems where local unprivileged user access is a concern. If firewalld is not required, it can be disabled. Disabling firewalld may impact network services that rely on it.\n\nTo disable firewalld:\nsudo systemctl stop firewalld\nsudo systemctl disable firewalld\n\nA system restart or service reload may be required for changes to take full effect.",
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            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
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      ],
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    }
  ]
}

CVE-2026-4948 (GCVE-0-2026-4948)

Vulnerability from cvelistv5 – Published: 2026-03-27 05:30 – Updated: 2026-07-30 09:27

Title

Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization

Summary

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-279 - Incorrect Execution-Assigned Permissions

Assigner

redhat

References

4 references

URL	Tags
https://access.redhat.com/errata/RHBA-2026:28238	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4948	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2452086	issue-trackingx_refsource_REDHAT
https://lists.debian.org/debian-lts-announce/2026…

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:2.4.2-1.el10_2 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.2
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
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

2026-03-27 00:00

Credits

Red Hat would like to thank Asim Viladi Oglu Manizada for reporting this issue.

Show details on NVD website

JSON

To clipboard

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      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "firewalld",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:2.4.2-1.el10_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "firewalld",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "packageName": "firewalld",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "packageName": "firewalld",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "unknown",
          "packageName": "rhcos",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Asim Viladi Oglu Manizada for reporting this issue."
        }
      ],
      "datePublic": "2026-03-27T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Moderate"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-279",
              "description": "Incorrect Execution-Assigned Permissions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-30T09:27:53.498Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHBA-2026:28238",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHBA-2026:28238"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-4948"
        },
        {
          "name": "RHBZ#2452086",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452086"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-27T04:44:51.806Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-03-27T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization",
      "workarounds": [
        {
          "lang": "en",
          "value": "To mitigate this issue, ensure that the firewalld desktop policy is not active on systems where local unprivileged user access is a concern. If firewalld is not required, it can be disabled. Disabling firewalld may impact network services that rely on it.\n\nTo disable firewalld:\nsudo systemctl stop firewalld\nsudo systemctl disable firewalld\n\nA system restart or service reload may be required for changes to take full effect."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-279: Incorrect Execution-Assigned Permissions"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-4948",
    "datePublished": "2026-03-27T05:30:23.632Z",
    "dateReserved": "2026-03-27T05:23:36.264Z",
    "dateUpdated": "2026-07-30T09:27:53.498Z",
    "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.

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

RHBA-2026:28238

CVE-2026-4948 (GCVE-0-2026-4948)

Tags

Sightings

Nomenclature