RHSA-2022:2186 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update Support, and Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions.

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: use-after-free in RDMA listen() (CVE-2021-4028)
• kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)

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.

Bug Fix(es):

• Extend /sys/devices/system/cpu/smt/* interface to all architectures [7.6.z] (BZ#2060991)

Solution

For details on how to apply this update, which includes the changes described in this advisory, 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
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64

Fixes

• BZ - 2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()
• BZ - 2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation

CVEs

• CVE-2021-4028
• CVE-2022-0492

References

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