CVE-2026-93834
CVE CVE-2026-93834EUVD EUVD-2026-87092Published 2026-09-25T13:36:17.000ZLast changed 2026-09-25T13:50:26.000ZCVSS 8.8
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Red Hat — Red Hat Enterprise Linux 10
- Red Hat — Red Hat Enterprise Linux 6
- Red Hat — Red Hat Enterprise Linux 7
- Red Hat — Red Hat Enterprise Linux 8
- Red Hat — Red Hat Enterprise Linux 9
- Red Hat — Red Hat Enterprise Linux for NVIDIA 26
- Red Hat — Red Hat OpenShift Container Platform 4
- Red Hat — Red Hat OpenStack Platform 13 (Queens)
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Red Hat — Red Hat Enterprise Linux
- Red Hat — Red Hat OpenShift Container Platform
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