Moderate: 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 Moderate. 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):

• Incomplete cleanup of multi-core shared buffers (aka SBDR) (CVE-2022-21123)
• Incomplete cleanup of microarchitectural fill buffers (aka SBDS) (CVE-2022-21125)
• Incomplete cleanup in specific special register write operations (aka DRPW) (CVE-2022-21166)

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):

• SolarFlare sfc spurious TX completion (BZ#1793280)
• Page allocation failure on cryptsetup open (BZ#2072970)
• The kernel-rt crashes where one task is indefinitely looping in __start_cfs_bandwidth() with the cfs_b->lock spinlock being held (BZ#2077346)
• While using PTimekeeper the qede driver produces excessive log messages (BZ#2080646)
• The kernel crashes due to a GPF happens in mutex_spin_on_owner(). The known RDMA/cma bug that was introduced with a patch from upstream commit 722c7b2bfead is the possible cause. (BZ#2085425)
• Running LTP testcase creat09 fails showing related to 'cve-2018-13405' (BZ#2089360)
• Crash when releasing inode which was on unmouted superblock (BZ#2096884)

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 Workstation 7 x86_64

Fixes

• BZ - 2090237 - CVE-2022-21123 hw: cpu: Incomplete cleanup of multi-core shared buffers (aka SBDR)
• BZ - 2090240 - CVE-2022-21125 hw: cpu: Incomplete cleanup of microarchitectural fill buffers (aka SBDS)
• BZ - 2090241 - CVE-2022-21166 hw: cpu: Incomplete cleanup in specific special register write operations (aka DRPW)

CVEs

• CVE-2022-21123
• CVE-2022-21125
• CVE-2022-21166

References

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