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: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2026

Last Modified

October 2, 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(20)

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

Patch Availability(26)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntudracut-test (110-11ubuntu0.1) @ resolute2026-10-04ubuntu
ubuntudracut-squash (060+5-1ubuntu3.4) @ noble2026-10-04ubuntu
redhatdracut-0:004-413.el6_102026-10-01redhat
redhatrhcos-417.94.202609191027-02026-10-01redhat
redhatrhcos-418.94.202609171815-02026-10-01redhat
redhatrhcos-415.92.202609140326-02026-09-28redhat
redhatdracut-0:049-138.git20220131.el8_4.12026-09-21redhat
redhatdracut-0:049-203.git20220511.el8_6.12026-09-21redhat
redhatrhcos-413.92.202609080414-02026-09-17redhat
redhatrhcos-418.94.202609031320-02026-09-17redhat
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-4.20.9.6.202608260604-02026-09-01redhat
redhatdracut-0:033-577.el7_92026-09-01redhat
redhatrhcos-4.22.9.8.202608251819-02026-09-01redhat
redhatdracut-0:049-223.git20230119.el8_8.12026-08-31redhat
redhatdracut-0:057-54.git20250423.el9_4.32026-08-20redhat
redhatdracut-0:105-4.el10_0.12026-08-20redhat
redhatdracut-0:057-89.git20250311.el9_6.12026-08-20redhat
redhatdracut-0:057-25.git20250717.el9_2.22026-08-20redhat
redhatdracut-0:049-246.git20260728.el8_102026-08-13redhat
redhatdracut-0:057-120.git20260728.el9_82026-08-13redhat
redhatdracut-0:107-9.el10_22026-08-13redhat

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 rangeFix by version rangeDependents
dracut059+212-1 ... 112-6 (82 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
dracut106-6 ... 112-6 (50 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
dracut106-6 ... 112-1 (45 versions)
  • every version up to 112-2: fixed in 112-2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 39× in last 7d / 187× 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 390 total refreshes for this CVE.

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

Related CVEs(same product + 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 on August 7, 2026, with the most recent update on October 2, 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 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15816?
CVE-2026-15816 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15816?
A fix for CVE-2026-15816 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15816 are linked in the Vendor Advisories panel on this page.

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