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Meta FAIRChem checkpoint converter allows RCE via untrusted data (ZDI-26-945)

Original title: ZDI-26-945: (0Day) Meta FAIRChem convert_fine_tune_checkpoint Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI Published Advisories ()
Part of a story covered by 10 sourcesZDI publishes nine unpatched Meta FAIRChem deserialization RCE flawsMerged summary & timeline
AI summary · x-ai/grok-4.7Summaries by Vani AI

Opening a malicious file or page can trigger code execution; ZDI scores the unpatched flaw 7.8.

ZDI-26-945 describes a zero-day deserialization flaw in Meta FAIRChem's convert_fine_tune_checkpoint function. A remote attacker can execute arbitrary code on affected installations if a user visits a malicious page or opens a malicious file. ZDI assigned a CVSS rating of 7.8. No product versions, patch, or CVE identifier appear in the notice.

Unconfirmed: No confirmed exploitation, affected version range, or vendor patch is stated.

Key facts
  • The vulnerable function is convert_fine_tune_checkpoint.
  • ZDI calls the issue a zero-day with CVSS 7.8.
  • Exploitation depends on the victim opening a file or page.
  • Versions, a fix, and a CVE are not given.
Security assessment · AI, from the article

Impact: Remote arbitrary code execution after user interaction

ProductAffected
Meta FAIRChem—
What to do
  1. 1.Avoid opening untrusted checkpoint files or pages with FAIRChem.
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From the original article

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Meta FAIRChem. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.

ZDI Published Advisories

zerodayinitiative.com

Read the full article at ZDI Published Advisories

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.