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Vulnerabilities

Vulnerability · ZDI-26-693

ZDI-26-693: Linux Kernel ksmbd Share Configuration Race Condition Remote Code Execution Vulnerability

Published Sep 14, 2026 · Linux Kernel ksmbd Share

Open the advisory

Exploitation likelihood is not on this record for ZDI-26-693. A missing EPSS score is not a low risk. Compare Linux Kernel ksmbd Share with the linked advisory before you change production.

Severity
High8.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
See sources for product scope

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. Furthermore, only systems with ksmbd enabled are vulnerable. The ZDI has assigned a CVSS rating of 8.5.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix ZDI-26-693

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for ZDI-26-693. A missing EPSS score is not a low risk. Compare Linux Kernel ksmbd Share with the linked advisory before you change production.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 14, 2026 · Catalog

    Detected

    This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. Furthermore, only systems with ksmbd enabled are vulnerable. The ZDI has assigned a CVSS rating of 8.5.

Sources

  • Zero Day InitiativeCoordinated disclosureZDI-26-693

    This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. Furthermore, only systems with ksmbd enabled are vulnerable. The ZDI has assigned a CVSS rating of 8.5.

    zerodayinitiative.com

Freshness

Last verified in this catalog Unknown date. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.