CVSS 3.1 Score 7.8 of 10 (high)


Published Sep 12, 2023
Updated: Jan 11, 2024
CWE ID 416


CVE-2023-4921 is a use-after-free vulnerability in the Linux kernel's net/sched: sch_qfq component that can be exploited to achieve local privilege escalation. This vulnerability affects various products, including Linux kernel versions that have not been upgraded past commit 8fc134fee27f2263988ae38920bc03da416b03d8. The vulnerability can be remediated by upgrading to a version beyond the mentioned commit. The potential danger of this vulnerability to an organization is high as it allows an attacker with low privileges to escalate their privileges and potentially gain unauthorized access to sensitive information or execute arbitrary code on the affected system. The severity of this vulnerability is rated as high, with a base score of 7.8 according to the CVSS:3.1 scoring system.


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