{"id":"AZL-105278","summary":"CVE-2026-93834 affecting package qemu 10.1.0-1","details":"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.","modified":"2026-10-03T05:35:10Z","published":"2026-09-25T14:17:24Z","upstream":["CVE-2026-93834"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93834"}],"affected":[{"package":{"name":"qemu","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/qemu"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"10.1.0-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105278.json"}}],"schema_version":"1.9.0"}