HIGHVulnerability
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NVD HIGH: CVE-2026-93834 — A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condit...

·Source: NIST NVD

Updated:

Executive Summary

A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and

Analysis

A use-after-free vulnerability was found in QEMU's 9pfs subsystem. A race condition between the main thread and a worker thread when processing concurrent Tlcreate and Twalk requests allows a malicious guest user to craft a fid path containing stale heap data, bypassing directory traversal restrictions and escaping the shared directory boundary. This can lead to arbitrary host file read/write and code execution (VM escape) as the QEMU process user. CVSS Score: 8.8. Published: 2026-09-25T14:17:24.063.

Indicators of Compromise (1)

CVE (1)
CVE-2026-93834
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Sep 25, 2026. Verified by: NIST.

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