RHSA-2024:1747 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 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.

Description

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

Security Fix(es):

• kernel: net/sched: fix use-after-free in HFSC qdisc (CVE-2023-4623)

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.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux Server - AUS 7.6 x86_64

Fixes

• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF

CVEs

• CVE-2023-4623

References

• https://access.redhat.com/security/updates/classification/#important