RHSA-2022:6983 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Extended 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.

The following packages have been upgraded to a later upstream version: kernel (4.18.0).

Security Fix(es):

• A use-after-free in cls_route filter implementation may lead to privilege escalation (CVE-2022-2588)

• Information leak in the IPv6 implementation (CVE-2021-45485)

• Information leak in the IPv4 implementation (CVE-2021-45486)

• 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):

• DR, Ignore modify TTL if ConnectX-5 doesn't support it (BZ#2075549)

• execve exit tracepoint not called (BZ#2106663)

• Unable to boot RHEL-8.6 on Brazos max. config (Install is success) (BZ#2107475)

• "vmcore failed, _exitcode:139" error observed while capturing vmcore during fadump after memory remove. incomplete vmcore is captured. (BZ#2107490)

• soft lockups under heavy I/O load to ahci connected SSDs (BZ#2110773)

• Allow substituting custom vmlinux.h for the build (BZ#2116407)