red-hatCVE-2026-93834
A use-after-free vulnerability was found in QEMU's 9pfs subsystem.
High8.8CVE-2026-93834 · Published Sep 25, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10 Vendor | all versions | No fix yet |
| Red Hat Enterprise Linux 6 Vendor | all versions | No fix yet |
| Red Hat Enterprise Linux 7 Vendor | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 8 Vendor | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat Enterprise Linux 9 Vendor | all versions | No fix yet |
| Red Hat Enterprise Linux for NVIDIA 26 Vendor | all versions | No fix yet |
| Red Hat OpenShift Container Platform 4 Vendor | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat OpenStack Platform 13 (Queens) Vendor | all versions | No fix yet |
Details and references
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 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Severity from
- no source yet
- Weakness
- CWE-416