0xBlackash/CVE-2026-46243

GitHubRepository PoCWriteup

PoC files

1 file

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GitHub
Analysisdeepseek-v4-pro:cloud ·

Technical assessment

The artifact is a README.md file providing a technical overview of CVE-2026-46243, a local privilege escalation vulnerability in the Linux kernel CIFS/SMB client. It describes the vulnerability, affected configurations, impact, and mitigation, but contains no exploit or scanner code.

Backdoor review

No backdoor observed in reviewed code

The repository contains only a README.md file with documentation about CVE-2026-46243. No executable code, scripts, or instructions for running a PoC are present. The content is purely informational, describing the vulnerability, affected configurations, impact, and mitigation. There is no evidence of backdoor behavior, concealed payloads, or deceptive instructions.

ClassificationWriteup
Model confidence100%
AuthenticationRequired
LanguagesMarkdown
Target softwareLinux KernelCIFS/SMB Client
Attack typesLocal Privilege Escalation
Evidence & reasoningClassification basis · observed behavior · safety review
Technical evidence

Classification basis and observed behavior

Classification basis

The artifact is a README.md file that provides a technical writeup of CVE-2026-46243, including an overview, affected configurations, impact, and mitigation. It contains no executable code, exploit, or scanner logic. The analysis routing classification is 'NO_POC_CODE_IDENTIFIED', and the file content is purely descriptive Markdown.

README.md:1-101

Requirements

  • Linux kernel with CIFS enabled, cifs-utils, default cifs.upcall, user namespaces enabled, local shell accessREADME.md:50-56

Observed behavior

  • Describes a vulnerability where improper validation of cifs.spnego key descriptions allows an unprivileged local user to impersonate trusted kernel-generated requests, potentially leading to privilege escalation.README.md:27-29
Safety-review evidence

Behaviors behind the backdoor verdict

Observables

File Content
README.mdThe sole file in the repository is a Markdown document describing CVE-2026-46243. It contains no code, commands, or links to external payloads.README.md:1-101
Review boundaries

What the analysis did not establish

  • The evidence packet contains only a single README.md file; no other source code, scripts, or binaries are present. The analysis routing classification confirms 'NO_POC_CODE_IDENTIFIED' and 'NO_EXECUTABLE_SOURCE_IDENTIFIED'.
  • Only the README.md file was present in the repository; no other files were available for review.
  • The analysis is limited to static text review; no dynamic execution or external resource verification was performed.
Model interpretation

This review is limited to the supplied PoC code and context. It does not assert that the code works or is safe to execute.

Linked vulnerabilities

1