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 v3.1 Score
8.8
/ 10.0
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Information
- Published
- 25 sept. 2026
- Updated
- 25 sept. 2026
- Status
- Received
- Source
- secalert@redhat.com
Weaknesses (CWE)
CWE-416
Similar CVEs
Other vulnerabilities of type CWE-416
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