HIGH 8.8 NVD
CVE-2026-93834
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 Tlcre
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.
References
- https://access.redhat.com/security/cve/CVE-2026-93834
- https://bugzilla.redhat.com/show_bug.cgi?id=2537939
- https://gitlab.com/qemu-project/qemu/-/work_items/4491
- https://gitlab.com/qemu-project/qemu/-/work_items/4491
This high severity vulnerability with a CVSS score of 8.8 was published on 2026-09-25 via NVD.
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