K000138726 : Linux kernel vulnerability CVE-2023-3611

Security Advisory Description

An out-of-bounds write vulnerability in the Linux kernel’s net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64. (CVE-2023-3611)

Impact

An attacker may be able to exploit this vulnerability to disclose sensitive information, modify data, or cause a denial-of-service (DoS).