CVE-2026-15816

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

August 7, 2026

Last Modified

September 17, 2026

Advisory Details (5)

Auto-updated Aug 7, 2026
Patch available. Sources: redhat.
generic

dracut/modules.d/99base/dracut-lib.sh at master · dracutdevs/dracut · GitHub

https://github.com/dracutdevs/dracut/blob/master/modules.d/99base/dracut-lib.sh
generic

dracut/modules.d/40network/netroot.sh at master · dracutdevs/dracut · GitHub

https://github.com/dracutdevs/dracut/blob/master/modules.d/40network/netroot.sh
redhat

2500889 – (CVE-2026-15816) CVE-2026-15816 dracut: dracut: root code execution via unescaped error message written to sourced emergency hook script in die()

https://bugzilla.redhat.com/show_bug.cgi?id=2500889
redhat Patch Available

2459963 – (CVE-2026-6893) CVE-2026-6893 dracut: dracut: Root code execution via DHCP options command injection

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2459963
redhat Patch Available

CVE-2026-15816 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-15816

Vendor Advisories for CVE-2026-15816(14)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(19)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudracut-test (110-11ubuntu0.1) @ resolute2026-09-18ubuntu
redhatrhcos-418.94.202609031320-02026-09-17redhat
redhatrhcos-413.92.202609080414-02026-09-17redhat
redhatrhcos-4.22.9.8.202609081748-02026-09-15redhat
redhatrhcos-414.92.202609011250-02026-09-14redhat
redhatrhcos-416.94.202609011112-02026-09-10redhat
redhatrhcos-4.19.9.6.202609021231-02026-09-09redhat
redhatrhcos-4.21.9.6.202609021100-02026-09-08redhat
redhatrhcos-4.22.9.8.202608251819-02026-09-01redhat
redhatrhcos-4.20.9.6.202608260604-02026-09-01redhat
redhatdracut-0:033-577.el7_92026-09-01redhat
redhatdracut-0:049-223.git20230119.el8_8.12026-08-31redhat
redhatdracut-0:105-4.el10_0.12026-08-20redhat
redhatdracut-0:057-54.git20250423.el9_4.32026-08-20redhat
redhatdracut-0:057-89.git20250311.el9_6.12026-08-20redhat
redhatdracut-0:057-25.git20250717.el9_2.22026-08-20redhat
redhatdracut-0:057-120.git20260728.el9_82026-08-13redhat
redhatdracut-0:107-9.el10_22026-08-13redhat
redhatdracut-0:049-246.git20260728.el8_102026-08-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dracut059+212-1 ... 112-2 (78 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dracut106-6 ... 112-2 (46 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dracut106-6 ... 112-2 (46 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 53× in last 7d / 230× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 305 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-18 18:19 UTCVendor advisory
  3. 2026-09-18 18:19 UTCGHSA enrichment
  4. 2026-09-18 06:48 UTCEG score recompute
  5. 2026-09-18 06:48 UTCVendor advisory
  6. 2026-09-18 06:48 UTCGHSA enrichment
  7. 2026-09-17 19:28 UTCEG score recompute
  8. 2026-09-17 19:28 UTCVendor advisory
  9. 2026-09-17 19:28 UTCGHSA enrichment
  10. 2026-09-17 18:29 UTCEG score recompute
  11. 2026-09-17 18:29 UTCVendor advisory
  12. 2026-09-17 18:29 UTCGHSA enrichment
  13. 2026-09-17 08:29 UTCEG score recompute
  14. 2026-09-17 08:29 UTCVendor advisory
  15. 2026-09-17 08:29 UTCGHSA enrichment
  16. 2026-09-17 08:09 UTCEG score recompute
  17. 2026-09-17 08:09 UTCVendor advisory
  18. 2026-09-17 08:09 UTCGHSA enrichment
  19. 2026-09-17 00:54 UTCEG score recompute
  20. 2026-09-17 00:54 UTCVendor advisory
  21. 2026-09-17 00:54 UTCGHSA enrichment
  22. 2026-09-16 14:07 UTCEPSS rescore
  23. 2026-09-16 05:14 UTCEPSS rescore
  24. 2026-09-16 02:52 UTCVendor advisory
  25. 2026-09-16 02:52 UTCGHSA enrichment
Show 75 more
  1. 2026-09-15 12:30 UTCEG score recompute
  2. 2026-09-15 12:30 UTCVendor advisory
  3. 2026-09-15 12:30 UTCGHSA enrichment
  4. 2026-09-15 11:33 UTCEG score recompute
  5. 2026-09-15 11:33 UTCVendor advisory
  6. 2026-09-15 11:33 UTCGHSA enrichment
  7. 2026-09-15 01:00 UTCVendor advisory
  8. 2026-09-15 01:00 UTCGHSA enrichment
  9. 2026-09-14 13:38 UTCEG score recompute
  10. 2026-09-14 13:38 UTCVendor advisory
  11. 2026-09-14 13:38 UTCGHSA enrichment
  12. 2026-09-14 13:10 UTCEG score recompute
  13. 2026-09-14 13:10 UTCVendor advisory
  14. 2026-09-14 13:10 UTCGHSA enrichment
  15. 2026-09-14 05:37 UTCVendor advisory
  16. 2026-09-14 05:37 UTCGHSA enrichment
  17. 2026-09-13 18:17 UTCEG score recompute
  18. 2026-09-13 18:17 UTCVendor advisory
  19. 2026-09-13 18:17 UTCGHSA enrichment
  20. 2026-09-13 16:46 UTCEPSS rescore
  21. 2026-09-13 06:57 UTCVendor advisory
  22. 2026-09-13 06:57 UTCGHSA enrichment
  23. 2026-09-12 19:33 UTCEG score recompute
  24. 2026-09-12 19:33 UTCVendor advisory
  25. 2026-09-12 19:33 UTCGHSA enrichment
  26. 2026-09-12 15:00 UTCEPSS rescore
  27. 2026-09-12 08:13 UTCVendor advisory
  28. 2026-09-12 08:13 UTCGHSA enrichment
  29. 2026-09-11 20:52 UTCEG score recompute
  30. 2026-09-11 20:52 UTCVendor advisory
  31. 2026-09-11 20:52 UTCGHSA enrichment
  32. 2026-09-11 14:52 UTCEPSS rescore
  33. 2026-09-11 09:36 UTCEPSS rescore
  34. 2026-09-11 09:18 UTCVendor advisory
  35. 2026-09-11 09:18 UTCGHSA enrichment
  36. 2026-09-10 21:58 UTCVendor advisory
  37. 2026-09-10 21:58 UTCGHSA enrichment
  38. 2026-09-10 10:38 UTCEG score recompute
  39. 2026-09-10 10:38 UTCVendor advisory
  40. 2026-09-10 10:38 UTCGHSA enrichment
  41. 2026-09-10 09:34 UTCEPSS rescore
  42. 2026-09-10 09:32 UTCEG score recompute
  43. 2026-09-10 09:32 UTCVendor advisory
  44. 2026-09-10 09:32 UTCGHSA enrichment
  45. 2026-09-10 04:20 UTCVendor advisory
  46. 2026-09-10 04:20 UTCGHSA enrichment
  47. 2026-09-09 16:55 UTCEG score recompute
  48. 2026-09-09 16:55 UTCVendor advisory
  49. 2026-09-09 16:54 UTCGHSA enrichment
  50. 2026-09-09 15:32 UTCEG score recompute
  51. 2026-09-09 15:32 UTCVendor advisory
  52. 2026-09-09 15:32 UTCGHSA enrichment
  53. 2026-09-09 06:01 UTCEG score recompute
  54. 2026-09-09 06:01 UTCVendor advisory
  55. 2026-09-09 06:01 UTCGHSA enrichment
  56. 2026-09-08 22:00 UTCEPSS rescore
  57. 2026-09-08 17:08 UTCEG score recompute
  58. 2026-09-08 17:08 UTCVendor advisory
  59. 2026-09-08 17:08 UTCGHSA enrichment
  60. 2026-09-08 16:13 UTCEG score recompute
  61. 2026-09-08 16:13 UTCVendor advisory
  62. 2026-09-08 16:12 UTCGHSA enrichment
  63. 2026-09-08 07:28 UTCVendor advisory
  64. 2026-09-08 07:28 UTCGHSA enrichment
  65. 2026-09-07 17:46 UTCEG score recompute
  66. 2026-09-07 17:46 UTCVendor advisory
  67. 2026-09-07 17:46 UTCGHSA enrichment
  68. 2026-09-07 16:01 UTCEPSS rescore
  69. 2026-09-06 14:55 UTCEG score recompute
  70. 2026-09-06 14:55 UTCVendor advisory
  71. 2026-09-06 14:55 UTCGHSA enrichment
  72. 2026-09-06 13:47 UTCEPSS rescore
  73. 2026-09-06 03:32 UTCVendor advisory
  74. 2026-09-06 03:32 UTCGHSA enrichment
  75. 2026-09-05 16:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-15816?
CVE-2026-15816 is a high vulnerability published on August 7, 2026. 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…
When was CVE-2026-15816 disclosed?
CVE-2026-15816 was first published in the National Vulnerability Database on August 7, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15816 actively exploited?
CVE-2026-15816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 76.7% of all scored CVEs.
What is the CVSS score of CVE-2026-15816?
CVE-2026-15816 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-15816?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15816, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-15816

Explore →

Is Your Infrastructure Affected by CVE-2026-15816?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs