Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222)
• kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)
• kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)

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):

• WARNING: CPU: 116 PID: 3440 at arch/x86/mm/extable.c:105 ex_handler_fprestore+0x3f/0x50 (BZ#2134586)
• Hardware error: RIP: copy_user_enhanced_fast_string+0xe (BZ#2137592)
• Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel (BZ#2139580)
• MEI support for Alder Lake-S (BZ#2141783)
• Host Pod -> Cluster IP Service traffic (Pod Backend - Different Node) Flow Iperf Cannot Connect (BZ#2141959)
• RHEL8.7: Xorg cannot display resolution higher than 1024x768 on system using ast graphics driver (BZ#2149287)
• Intel 8.7 Bug: OS doesn't boot when vmd and interrupt remapping are enabled (BZ#2149474)
• i40e,iavf: SR-IOV VF devices send GARP with wrong MAC address (BZ#2149745)
• RHEL8.4 - boot: Add secure boot trailer (BZ#2151530)
• error 524 from seccomp(2) when trying to load filter (BZ#2152138)
• Workqueue: WQ_MEM_RECLAIM iscsi_ctrl_1:98 __iscsi_unbind_session [scsi_transport_iscsi] (BZ#2152734)
• Connectivity issue with vDPA driver (BZ#2152912)
• High Load average due to cfs cpu throttling (BZ#2153108)
• The "kernel BUG at mm/usercopy.c:103!" from BZ 2041529 is back on rhel-8.5 (BZ#2153230)
• RHEL8: tick storm on nohz (isolated) CPU cores (BZ#2153653)
• kernel BUG: scheduling while atomic: crio/7295/0x00000002 (BZ#2154460)
• Azure RHEL 8 z-stream: Sometimes newly deployed VMs are not getting accelerated network during provisioning (BZ#2155272)
• Azure: VM Deployment Failures Patch Request (BZ#2155280)
• Azure vPCI RHEL-8: add the support of multi-MSI (BZ#2155289)
• MSFT MANA NET Patch RHEL-8: Fix race on per-CQ variable napi_iperf panic fix (BZ#2155437)
• GSS: OCP 4.10.30 node crash after ODF upgrade : unable to handle kernel NULL pointer dereference at 0000000000000000 : ceph_get_snap_realm+0x68/0xa0 [ceph] (BZ#2155797)
• Error in /usr/src/kernels/4.18.0-423.el8.x86_64/scripts/kernel-doc script causing irdma build to fail (BZ#2157905)
• RHEL8.8: Backport upstream patches to reduce memory cgroup memory consumption and OOM problem (BZ#2157922)
• The 'date' command shows wrong time in nested KVM s390x guest (BZ#2158813)
• ethtool -m results in an out-of-bounds slab write in the be2net driver (BZ#2160182)
• (Redhat OpenShift)Error downloading big ZIP files inside pod on power OCP and pod getting restarted (BZ#2160221)
• i40e/iavf: VF reset task fails "Never saw reset" with 5 second timeout per VF (BZ#2160460)
• iavf: It takes long time to create multiple VF interfaces and the VF interface names are not consistent (BZ#2163257)

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 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64

Fixes

• BZ - 2119048 - CVE-2022-2873 kernel: an out-of-bounds vulnerability in i2c-ismt driver
• BZ - 2138818 - CVE-2022-41222 kernel: mm/mremap.c use-after-free vulnerability
• BZ - 2141752 - CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data

CVEs

• CVE-2022-2873
• CVE-2022-41222
• CVE-2022-43945

References

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