CVE-2026-15816 (GCVE-0-2026-15816)
Vulnerability from cvelistv5 – Published: 2026-08-07 10:33 – Updated: 2026-09-21 03:05
VLAI
EPSS
VEX
Title
Dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()
Summary
A flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 14:32 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
25 references
Impacted products
26 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:107-9.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:105-4.el10_0.1 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
||
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:033-577.el7_9 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:049-246.git20260728.el8_10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:8::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
0:049-138.git20220131.el8_4.1 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
0:049-138.git20220131.el8_4.1 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.4::baseos cpe:/o:redhat:rhel_eus_long_life:8.4::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
0:049-203.git20220511.el8_6.1 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
0:049-203.git20220511.el8_6.1 , < *
(rpm)
cpe:/o:redhat:rhel_aus:8.6::baseos cpe:/o:redhat:rhel_eus_long_life:8.6::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
0:049-223.git20230119.el8_8.1 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
0:049-223.git20230119.el8_8.1 , < *
(rpm)
cpe:/o:redhat:rhel_e4s:8.8::baseos cpe:/o:redhat:rhel_tus:8.8::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:057-120.git20260728.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/o:redhat:enterprise_linux:9::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:057-25.git20250717.el9_2.2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::appstream cpe:/o:redhat:rhel_e4s:9.2::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:057-54.git20250423.el9_4.3 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4::appstream cpe:/o:redhat:rhel_e4s:9.4::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:057-89.git20250311.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6::appstream cpe:/o:redhat:rhel_eus:9.6::baseos |
||
| Red Hat | Red Hat OpenShift Container Platform 4.13 |
Unaffected:
413.92.202609080414-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.13::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.14 |
Unaffected:
414.92.202609011250-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.14::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.16 |
Unaffected:
416.94.202609011112-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.16::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
418.94.202609031320-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.18::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202609021231-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.20 |
Unaffected:
4.20.9.6.202608260604-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.20::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.21 |
Unaffected:
4.21.9.6.202609021100-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.21::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.22 |
Unaffected:
4.22.9.8.202608251819-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.22::el9 |
||
| Red Hat | Red Hat OpenShift Container Platform 4.22 |
Unaffected:
4.22.9.8.202609081748-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.22::el9 |
||
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
||
| 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
2026-08-05 23:59
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"url": "https://access.redhat.com/errata/RHSA-2026:65851"
},
{
"name": "RHSA-2026:66357",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:66357"
},
{
"name": "RHSA-2026:69118",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:69118"
},
{
"name": "RHSA-2026:69119",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2026:69119"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-15816"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2459963"
},
{
"name": "RHBZ#2500889",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500889"
},
{
"url": "https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh"
},
{
"url": "https://github.com/dracutdevs/dracut/blob/master/modules.d/99base/dracut-lib.sh"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-06-10T19:21:21.000Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-08-05T23:59:00.000Z",
"value": "Made public."
}
],
"title": "Dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()",
"workarounds": [
{
"lang": "en",
"value": "Restrict DHCP server access on networks used for network boot (DHCP snooping, dedicated/trusted provisioning VLANs) until a fix is available."
}
],
"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-2026-15816",
"datePublished": "2026-08-07T10:33:33.612Z",
"dateReserved": "2026-07-15T11:41:57.564Z",
"dateUpdated": "2026-09-21T03:05:35.290Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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