Vulnerability-Lookup

RHSA-2026:40700

Vulnerability from csaf_redhat - Published: 2026-07-16 05:07 - Updated: 2026-07-22 15:21

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Important

Notes

Topic: An update for Red Hat Hardened Images RPMs is now available.

Details: This update includes the following RPMs: dracut: * dracut-109-7.hum1 (aarch64, x86_64) * dracut-caps-109-7.hum1 (aarch64, x86_64) * dracut-config-generic-109-7.hum1 (aarch64, x86_64) * dracut-config-rescue-109-7.hum1 (aarch64, x86_64) * dracut-live-109-7.hum1 (aarch64, x86_64) * dracut-network-109-7.hum1 (aarch64, x86_64) * dracut-squash-109-7.hum1 (aarch64, x86_64) * dracut-tools-109-7.hum1 (aarch64, x86_64) * dracut-109-7.hum1.src (src)

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-2026-16445

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.

7.5 (High)


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

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

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: Red Hat Hardened Images:dracut-main@aarch64	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dracut-main@src	—	Vendor Fix fix Workaround
Unresolved product id: Red Hat Hardened Images:dracut-main@x86_64	—	Vendor Fix fix Workaround

Threats

Impact Important

References

12 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:40700	self
https://images.redhat.com/	external
https://access.redhat.com/security/cve/CVE-2026-16445	external
https://access.redhat.com/security/updates/classi…	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-16445	self
https://bugzilla.redhat.com/show_bug.cgi?id=2503147	external
https://www.cve.org/CVERecord?id=CVE-2026-16445	external
https://nvd.nist.gov/vuln/detail/CVE-2026-16445	external
https://access.redhat.com/errata/RHSA-2026:26534	external
https://bugzilla.redhat.com/show_bug.cgi?id=2459963	external
https://github.com/dracutdevs/dracut/commit/e509c638e6	external

Acknowledgments

Red Hat Pavel Valena

JSON

To clipboard

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          "title": "Vulnerability description"
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}

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

Vulnerability from cvelistv5 – Published: 2026-07-21 12:51 – Updated: 2026-07-22 18:00

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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

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

Assigner

redhat

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:26534	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:40700	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 Hardened Images	Unaffected: 109-7.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
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 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).

Show details on NVD website

JSON

To clipboard

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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-22T14:58:00.425Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:26534",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26534"
        },
        {
          "name": "RHSA-2026:40700",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:40700"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-16445"
        },
        {
          "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"
        },
        {
          "url": "https://github.com/dracutdevs/dracut/commit/e509c638e6"
        }
      ],
      "timeline": [
        {
          "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"
      },
      "x_redhatCweChain": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-16445",
    "datePublished": "2026-07-21T12:51:08.650Z",
    "dateReserved": "2026-07-21T08:23:53.560Z",
    "dateUpdated": "2026-07-22T18:00:32.326Z",
    "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

RHSA-2026:40700

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

Tags

Sightings

Nomenclature