CVEvulnerability
CVE-2026-93834
8.8 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-25
- Last modified
- 2026-09-29
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-416
Description
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.
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://access.redhat.com/security/cve/CVE-2026-93834 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2537939 bugzilla.redhat.com
- https://gitlab.com/qemu-project/qemu/-/work_items/4491 gitlab.com
- https://gitlab.com/qemu-project/qemu/-/work_items/4491 gitlab.com