An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced
 Update Support.

Red Hat Product Security has rated this update as having a security impact of
 Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating
 system.

Security Fix(es):

* kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg
 function happens qfq_enqueue overhead (CVE-2023-3611)

* kernel: net/sched: cls_fw component can be exploited as result of failure in
 tcf_change_indev function (CVE-2023-3776)

* kernel: net/sched: Use-after-free vulnerabilities in the net/sched
 classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

For more details about the security issue(s), including the impact, a CVSS
 score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2023-3611: Out-of-bounds Write (CWE-787)
CVE-2023-3776: Use After Free (CWE-416)
CVE-2023-4128: Use After Free (CWE-416)
CVE-2023-4206: Use After Free (CWE-416)
CVE-2023-4207: Use After Free (CWE-416)
CVE-2023-4208: Use After Free (CWE-416)