Vulnerability-Lookup

GHSA-4672-282M-8FGR

Vulnerability from github – Published: 2026-07-21 15:30 – Updated: 2026-07-21 15:30

Details

A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut's NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-16445"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T13:17:16Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut\u0027s NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.",
  "id": "GHSA-4672-282m-8fgr",
  "modified": "2026-07-21T15:30:43Z",
  "published": "2026-07-21T15:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16445"
    },
    {
      "type": "WEB",
      "url": "https://github.com/dracutdevs/dracut/commit/e509c638e6"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:26534"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-16445"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459963"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2503147"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-16445 (GCVE-0-2026-16445)

Vulnerability from cvelistv5 – Published: 2026-07-21 12:51 – Updated: 2026-07-21 12:57

Title

Dracut: dracut: root code execution via dhcp options command injection in networkmanager initrd module

Summary

Severity

7.5 (High)


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

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

redhat

References

5 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:26534	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-16445	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2459963
https://bugzilla.redhat.com/show_bug.cgi?id=2503147	issue-trackingx_refsource_REDHAT
https://github.com/dracutdevs/dracut/commit/e509c638e6

Impacted products

7 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 8	Unaffected: 0:049-244.git20260529.el8_10 , < * (rpm) cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-07-21 00:00

Credits

This issue was discovered by Pavel Valena (Red Hat).

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8::baseos"
          ],
          "defaultStatus": "affected",
          "packageName": "dracut",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:049-244.git20260529.el8_10",
              "versionType": "rpm"
            }
          ]
        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "unaffected",
          "packageName": "dracut",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unaffected",
          "packageName": "dracut",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "unaffected",
          "packageName": "dracut",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "unaffected",
          "packageName": "dracut",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
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          "defaultStatus": "affected",
          "packageName": "dracut",
          "product": "Red Hat Hardened Images",
          "vendor": "Red Hat"
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          "cpes": [
            "cpe:/a:redhat:openshift:4"
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          "packageName": "dracut",
          "product": "Red Hat OpenShift Container Platform 4",
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        {
          "lang": "en",
          "value": "A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut\u0027s NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
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            "type": "Red Hat severity rating"
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        },
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            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "providerMetadata": {
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          "name": "RHSA-2026:26534",
          "tags": [
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          "url": "https://access.redhat.com/errata/RHSA-2026:26534"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
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        },
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459963"
        },
        {
          "name": "RHBZ#2503147",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2503147"
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          "lang": "en",
          "time": "2026-05-29T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-07-21T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Dracut: dracut: root code execution via dhcp options command injection in networkmanager initrd module",
      "workarounds": [
        {
          "lang": "en",
          "value": "Escape DHCP-derived values (root-path, next-server, dhcp-bootfile) with shell-safe quoting (for example printf \u0027%q\u0027) before writing them to the generated dhcpopts file in modules.d/35network-manager/nm-run.sh. This approach is already used in dracut-057 and later, and is already present in the RHEL 8.10.z dracut-049-244.git20260529.el8_10 build."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
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    }
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  "cveMetadata": {
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    "assignerShortName": "redhat",
    "cveId": "CVE-2026-16445",
    "datePublished": "2026-07-21T12:51:08.650Z",
    "dateReserved": "2026-07-21T08:23:53.560Z",
    "dateUpdated": "2026-07-21T12:57:52.309Z",
    "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

GHSA-4672-282M-8FGR

CVE-2026-16445 (GCVE-0-2026-16445)

Tags

Sightings

Nomenclature