RHSA-2022:0186 - Security Advisory

Topic

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.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout (CVE-2021-4154)
• kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL (CVE-2021-4155)
• kernel: fs_context: heap overflow in legacy parameter handling (CVE-2022-0185)

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):

• ionic upstream bug fix - linearize skb with too many frags (BZ#1952077)
• kernel show “ BUG: scheduling while atomic:xxx“ and reboot when an uncorrectable memory error injection on RHEL8.4 beta and GA (BZ#2003993)
• [RHEL 8.3] Discard request from mkfs.xfs takes too much time on raid10 (BZ#2020418)
• CNB: Rebase/update TC subsystem for RHEL 8.5 (BZ#2021644)
• Proactively Backport MM fixes for el8.5 - 2nd round (BZ#2023923)
• [RHEL-8.6][SanityOnly] Backport leftover migrate_disable BPF related change (BZ#2027688)
• Backport kernel audit enhancements and fixes from v5.10 to v5.13-rc1 (BZ#2028871)
• Proactively Backport MM fixes for el8.5 (BZ#2029383)
• iommu/amd: Fix unable to handle page fault due to AVIC (BZ#2030853)
• RCU stall WARNING: at kernel/rcu/tree.c:1392 rcu_advance_cbs_nowake+0x51/0x60 (BZ#2032578)
• PTP "clock jumped backward or running slower than expected!" in OpenShift 4.8 environment with Intel E810 (BZ#2037834)

Enhancement(s):

• [Mellanox 8.5 FEAT] mlx5: drivers update upto Linux v5.12 (BZ#2023918)

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 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.4 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.4 aarch64

Fixes

• BZ - 2034514 - CVE-2021-4154 kernel: local privilege escalation by exploiting the fsconfig syscall parameter leads to container breakout
• BZ - 2034813 - CVE-2021-4155 kernel: xfs: raw block device data leak in XFS_IOC_ALLOCSP IOCTL
• BZ - 2040358 - CVE-2022-0185 kernel: fs_context: heap overflow in legacy parameter handling

CVEs

• CVE-2021-4154
• CVE-2021-4155
• CVE-2022-0185

References

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