Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.

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: 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):

• kernel panic in mlx5_ib driver RHEL/CentOS 7.9 VM (BZ#2046571)
• [RHEL-7.9] Get Call Trace about "kernel/timer.c:1270 requeue_timers+0x15e/0x170" on specified AMD x86_64 system (BZ#2048502)
• kernel NULL pointer dereference while calling dma_pool_alloc from the mlx5_core module (BZ#2055457)
• Rhel 7.9 NFS Clients takes very long time to resume operations in an NFS Server failover scenario (BZ#2066699)
• perf stat shows unsupported counters for Intel IceLake cpu (BZ#2072317)

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 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Virtualization Host 4 for RHEL 7 x86_64

Fixes

• BZ - 2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation
• BZ - 2055457 - kernel NULL pointer dereference while calling dma_pool_alloc from the mlx5_core module [rhel-7.9.z]

CVEs

• CVE-2022-0492

References

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