CVE-2026-15816

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-07. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
Trending — 4 sources updated 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(high)
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
18%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 20, 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(8)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatdracut-0:107-9.el10_22026-08-13redhat
redhatdracut-0:049-246.git20260728.el8_102026-08-13redhat
redhatdracut-0:057-120.git20260728.el9_82026-08-13redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 56× in last 7d / 93× 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.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 22:19 UTCEG score recompute
  3. 2026-08-20 22:19 UTCVendor advisory
  4. 2026-08-20 22:19 UTCGHSA enrichment
  5. 2026-08-20 21:22 UTCEG score recompute
  6. 2026-08-20 21:22 UTCVendor advisory
  7. 2026-08-20 21:22 UTCGHSA enrichment
  8. 2026-08-20 21:07 UTCEG score recompute
  9. 2026-08-20 21:07 UTCVendor advisory
  10. 2026-08-20 21:07 UTCGHSA enrichment
  11. 2026-08-20 17:35 UTCEG score recompute
  12. 2026-08-20 17:35 UTCVendor advisory
  13. 2026-08-20 17:35 UTCGHSA enrichment
  14. 2026-08-20 16:45 UTCEG score recompute
  15. 2026-08-20 16:45 UTCVendor advisory
  16. 2026-08-20 16:45 UTCGHSA enrichment
  17. 2026-08-20 14:18 UTCVendor advisory
  18. 2026-08-20 14:18 UTCGHSA enrichment
  19. 2026-08-20 01:58 UTCEG score recompute
  20. 2026-08-20 01:58 UTCVendor advisory
  21. 2026-08-20 01:58 UTCGHSA enrichment
  22. 2026-08-19 17:03 UTCEPSS rescore
  23. 2026-08-19 14:37 UTCVendor advisory
  24. 2026-08-19 14:37 UTCGHSA enrichment
  25. 2026-08-19 03:12 UTCVendor advisory
Show 68 more
  1. 2026-08-19 03:11 UTCGHSA enrichment
  2. 2026-08-18 15:46 UTCEG score recompute
  3. 2026-08-18 15:46 UTCVendor advisory
  4. 2026-08-18 15:46 UTCGHSA enrichment
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-18 04:26 UTCVendor advisory
  7. 2026-08-18 04:26 UTCGHSA enrichment
  8. 2026-08-17 17:06 UTCEG score recompute
  9. 2026-08-17 17:06 UTCVendor advisory
  10. 2026-08-17 17:06 UTCGHSA enrichment
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-17 05:46 UTCVendor advisory
  13. 2026-08-17 05:46 UTCGHSA enrichment
  14. 2026-08-16 18:26 UTCEG score recompute
  15. 2026-08-16 18:26 UTCVendor advisory
  16. 2026-08-16 18:26 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 07:05 UTCEG score recompute
  19. 2026-08-16 07:05 UTCVendor advisory
  20. 2026-08-16 07:05 UTCGHSA enrichment
  21. 2026-08-16 02:14 UTCEPSS rescore
  22. 2026-08-15 19:46 UTCVendor advisory
  23. 2026-08-15 19:46 UTCGHSA enrichment
  24. 2026-08-15 08:26 UTCEG score recompute
  25. 2026-08-15 08:26 UTCVendor advisory
  26. 2026-08-15 08:26 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 21:05 UTCVendor advisory
  29. 2026-08-14 21:05 UTCGHSA enrichment
  30. 2026-08-14 09:45 UTCVendor advisory
  31. 2026-08-14 09:45 UTCGHSA enrichment
  32. 2026-08-13 22:25 UTCEG score recompute
  33. 2026-08-13 22:25 UTCGHSA enrichment
  34. 2026-08-13 22:09 UTCEG score recompute
  35. 2026-08-13 22:09 UTCGHSA enrichment
  36. 2026-08-13 22:00 UTCEPSS rescore
  37. 2026-08-13 21:44 UTCGHSA enrichment
  38. 2026-08-13 10:24 UTCGHSA enrichment
  39. 2026-08-12 23:04 UTCEG score recompute
  40. 2026-08-12 23:04 UTCGHSA enrichment
  41. 2026-08-12 13:50 UTCEPSS rescore
  42. 2026-08-12 11:45 UTCGHSA enrichment
  43. 2026-08-12 00:25 UTCEG score recompute
  44. 2026-08-12 00:25 UTCGHSA enrichment
  45. 2026-08-11 13:42 UTCEPSS rescore
  46. 2026-08-11 13:05 UTCGHSA enrichment
  47. 2026-08-11 01:45 UTCEG score recompute
  48. 2026-08-11 01:45 UTCGHSA enrichment
  49. 2026-08-11 00:00 UTCEPSS rescore
  50. 2026-08-10 14:25 UTCGHSA enrichment
  51. 2026-08-10 03:05 UTCGHSA enrichment
  52. 2026-08-09 15:45 UTCEG score recompute
  53. 2026-08-09 15:45 UTCGHSA enrichment
  54. 2026-08-09 13:46 UTCEPSS rescore
  55. 2026-08-09 04:26 UTCGHSA enrichment
  56. 2026-08-08 17:06 UTCEG score recompute
  57. 2026-08-08 17:06 UTCGHSA enrichment
  58. 2026-08-08 16:37 UTCEPSS rescore
  59. 2026-08-08 05:46 UTCGHSA enrichment
  60. 2026-08-07 18:26 UTCEG score recompute
  61. 2026-08-07 18:26 UTCGHSA enrichment
  62. 2026-08-07 17:27 UTCEG score recompute
  63. 2026-08-07 17:27 UTCGHSA enrichment
  64. 2026-08-07 13:46 UTCEG score recompute
  65. 2026-08-07 13:46 UTCGHSA enrichment
  66. 2026-08-07 11:24 UTCEG score recompute
  67. 2026-08-07 10:48 UTCEG score recompute
  68. 2026-08-07 10:47 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

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 August 20, 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 82.2% 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

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