RHSA-2022:0820 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Critical. 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.

The following packages have been upgraded to a later upstream version: kernel (4.18.0). (BZ#2036933)

Security Fix(es):

• kernel: improper initialization of the "flags" member of the new pipe_buffer (CVE-2022-0847)
• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)
• kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
• kernel: cgroups v1 release_agent feature may allow privilege escalation (CVE-2022-0492)
• kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)

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):

• [Intel 8.3 Bug] ICX Whitley: PCIe - kernel panic with AER-INJECT (BZ#2040309)
• [ESXi][RHEL8] A task is stuck waiting for the completion of the vmci_resouce releasing upon the balloon reset. [None8.2.0.z] (BZ#2052200)

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 for x86_64 - Extended Update Support 8.2 x86_64
• Red Hat Enterprise Linux Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 aarch64

Fixes

• BZ - 2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it
• BZ - 2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush
• BZ - 2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation
• BZ - 2051505 - CVE-2022-0492 kernel: cgroups v1 release_agent feature may allow privilege escalation
• BZ - 2060795 - CVE-2022-0847 kernel: improper initialization of the "flags" member of the new pipe_buffer

CVEs

• CVE-2021-4083
• CVE-2022-0330
• CVE-2022-0492
• CVE-2022-0847
• CVE-2022-22942

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/vulnerabilities/RHSB-2022-002