CVE-2026-93834 | BDVDB-2026-379239 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-09-25Record published in the CVE List.
2. Version 22026-11-05Most recent update recorded in the CVE List.