Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 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: KVM: cmpxchg_gpte can write to pfns outside the userspace region (CVE-2022-1158)
• kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size() (CVE-2022-2639)

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):

• x86/intel: processors require energy_perf_bias setting (BZ#2102103)
• System crashes due to list_add double add at iwl_mvm_mac_wake_tx_queue+0x71 (BZ#2112264)
• Fix SCHED_WARN_ON deadlock (BZ#2125422)
• Starting VMs on a KVM-host with EL8.6-kernel sometimes produces timejumps into the future for other already running guest-VMs [rhel.8] (BZ#2125671)
• RHEL8.4 - zfcp: fix missing auto port scan and thus missing target ports (BZ#2127850)
• vfio zero page mappings fail after 2M instances (BZ#2128516)
• The kernel needs to offer a way to reseed the Crypto DRBG and atomically extract random numbers from it (BZ#2129728)
• ice: Driver Update up to 5.19 (BZ#2130993)
• virtio-net: support XDP when not more queues (BZ#2131740)
• VMs hang after migration (BZ#2131756)
• Update NVME subsystem with bug fixes and minor changes (BZ#2132555)
• [HPE BUG] Premature swapping with swappiness=0 while there’s still plenty of pagecache to be reclaimed. (BZ#2133831)
• nf_conntrack causing nfs to stall (BZ#2134089)
• Fix issue that enables STABLE_WRITES by default and causes performance regressions (BZ#2135814)
• [ice] Intel E810 PTP clock glitching (BZ#2136037)
• ice: arp replies not making it to switch (BZ#2136043)
• [ice]configure link-down-on-close on and change interface mtu to 9000,the interface can't up (BZ#2136217)
• ice: dump additional CSRs for Tx hang debugging (BZ#2136514)
• crypto/testmgr.c should not list dh, ecdh as .fips_allowed = 1 (BZ#2136525)
• FIPS module identification via name and version (BZ#2136540)
• FIPS self-tests for RSA pkcs7 signature verification (BZ#2137316)
• After upgrading to ocp4.11.1, our dpdk application using vlan strip offload is not working (BZ#2138158)
• WARNING: CPU: 0 PID: 9637 at kernel/time/hrtimer.c:1309 hrtimer_start_range_ns+0x35d/0x400 (BZ#2138954)
• [DELL EMC 8.6-RT BUG] System is not booting into RT Kernel with perc12. (BZ#2139217)
• Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel (BZ#2139581)
• Laser bias information can't be shown by ethtool on rhel8.6 (BZ#2139638)
• Nested KVM is not working on RHEL 8.6 with hardware error 0x7 (BZ#2140144)

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 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Virtualization Host 4 for RHEL 8 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.6 aarch64

Fixes

• BZ - 2069793 - CVE-2022-1158 kernel: KVM: cmpxchg_gpte can write to pfns outside the userspace region
• BZ - 2084479 - CVE-2022-2639 kernel: openvswitch: integer underflow leads to out-of-bounds write in reserve_sfa_size()

CVEs

• CVE-2022-1158
• CVE-2022-2639

References

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