{"uuid": "195dfef9-8b95-43d3-bf4e-aeb6aadae875", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-4921", "type": "seen", "source": "https://t.me/cibsecurity/70346", "content": "\u203c CVE-2023-4921 \u203c\n\nA use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation.When the plug qdisc is used as a class of the qfq qdisc, sending network packets triggers use-after-free in qfq_dequeue() due to the incorrect .peek handler of sch_plug and lack of error checking in agg_dequeue().We recommend upgrading past commit 8fc134fee27f2263988ae38920bc03da416b03d8.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2023-09-13T00:23:12.000000Z"}