Skip to main content
CVE-2026-47243VulnerabilityPublished

Microsoft · Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs

Affects MicrosoftSource GCVE Database

0
Compare

Not known to be exploited.

Data as of 8 Nov 2026, 23:24 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
Fixed in–

Description

CVE-2026-47243 is a vulnerability in Microsoft software identified as a guest-to-host escape via virtiofs in the Kata runtime environment. It involves a guest-root user gaining host-root privileges, classified under CWE-22 (Path Traversal). The affected version explicitly stated is version 3.0. No CVSS score or detailed technical exploit information is provided. There is no indication of known exploits in the wild or available patches at this time.

References

Community reviews

Loading reviews…