Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs
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.
AI Analysis
Technical Summary
This vulnerability, tracked as CVE-2026-47243, allows a guest-root user in the Kata runtime environment to escape to host-root privileges through the virtiofs interface. It is categorized as a path traversal issue (CWE-22). The only affected version explicitly mentioned is version 3.0. The Microsoft Security Response Center is the publisher, but no patch or remediation details are provided in the available data.
Potential Impact
If successfully exploited, this vulnerability could allow a user with guest-root access inside a Kata runtime environment to escalate privileges to host-root, potentially compromising the host system. However, no known exploits in the wild have been reported, and the extent of impact depends on the deployment context and presence of mitigating controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or workaround information is provided in the current data.
Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs
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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, tracked as CVE-2026-47243, allows a guest-root user in the Kata runtime environment to escape to host-root privileges through the virtiofs interface. It is categorized as a path traversal issue (CWE-22). The only affected version explicitly mentioned is version 3.0. The Microsoft Security Response Center is the publisher, but no patch or remediation details are provided in the available data.
Potential Impact
If successfully exploited, this vulnerability could allow a user with guest-root access inside a Kata runtime environment to escalate privileges to host-root, potentially compromising the host system. However, no known exploits in the wild have been reported, and the extent of impact depends on the deployment context and presence of mitigating controls.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or workaround information is provided in the current data.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-47243
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a7891d2bf8831d539c86950
Added to database: 08/09/2026, 14:42:26 UTC
Last enriched: 08/09/2026, 14:48:36 UTC
Last updated: 08/10/2026, 00:41:16 UTC
Views: 7
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