RHSA-2021:0558: Important: kernel security, bug fix, and enhancement update

First published: Tue Feb 16 2021(Updated: )

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</li> 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.<br>Bug Fix(es):<br><li> Final fixes + drop alpha_support flag requirement for Tigerlake (BZ#1882620)</li> <li> OVS complains Invalid Argument on TCP packets going into conntrack (BZ#1892744)</li> <li> BUG: using smp_processor_id() in preemptible [00000000] code: handler106/3082 (BZ#1893281)</li> <li> Icelake performance - add intel_idle: Customize IceLake server support to RHEL-8 (BZ#1897183)</li> <li> [mlx5] IPV6 TOS rewrite flows are not getting offloaded in HW (BZ#1897688)</li> <li> RHEL 8.3 SAS - multipathd fails to re-establish paths during controller random reset (BZ#1900112)</li> <li> RHEL8.3 Beta - RHEL8.3 hangs on dbginfo.sh execution, crash dump generated (mm-) (BZ#1903019)</li> <li> Win10 guest automatic reboot after migration in Win10 and WSL2 on AMD hosts (BZ#1905084)</li> <li> block, dm: fix IO splitting for stacked devices (BZ#1905136)</li> <li> Failed to hotplug scsi-hd disks (BZ#1905214)</li> <li> PCI quirk needed to prevent GPU hang (BZ#1906516)</li> <li> RHEL8.2 - various patches to stabilize the OPAL error log processing and the powernv dump processing (ESS) (BZ#1907301)</li> <li> pmtu not working with tunnels as bridge ports and br_netfilter loaded (BZ#1907576)</li> <li> [ThinkPad X13/T14/T14s AMD]: Kdump failed (BZ#1907775)</li> <li> NFSv4 client improperly handles interrupted slots (BZ#1908312)</li> <li> NFSv4.1 client ignores ERR_DELAY during LOCK recovery, could lead to data corruption (BZ#1908313)</li> <li> [Regression] RHEL8.2 - [kernel 148.el8] cpu (sys) time regression in SAP HANA 2.0 benchmark benchInsertSubSelectPerformance (BZ#1908519)</li> <li> RHEL8: kernel-rt: kernel BUG at kernel/sched/deadline.c:1462! (BZ#1908731)</li> <li> SEV VM hang at efi_mokvar_sysfs_init+0xa9/0x19d during boot (BZ#1909243)</li> <li> C6gn support requires "Ensure dirty bit is preserved across pte_wrprotect" patch (BZ#1909577)</li> <li> [Lenovo 8.3 &amp; 8.4 Bug] [Regression] No response from keyboard and mouse when boot from tboot kernel (BZ#1911555)</li> <li> Kernel crash with krb5p (BZ#1912478)</li> <li> [RHEL8] Need additional backports for FIPS 800-90A DRBG entropy seeding source (BZ#1912872)</li> <li> [Hyper-V][RHEL-8] Request to included a commit that adds a timeout to vmbus_wait_for_unload (BZ#1913528)</li> <li> Host becomes unresponsive during stress-ng --cyclic test rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (BZ#1913964)</li> <li> RHEL8.4: Backport upstream RCU patches up to v5.6 (BZ#1915638)</li> <li> Missing mm backport to fix regression introduced by another mm backport (BZ#1915814)</li> <li> [Hyper-V][RHEL-8]video: hyperv_fb: Fix the cache type when mapping the VRAM Edit (BZ#1917711)</li> <li> ionic 0000:39:00.0 ens2: IONIC_CMD_Q_INIT (40) failed: IONIC_RC_ERROR (-5) (BZ#1918372)</li> <li> [certification] mlx5_core depends on tls triggering TAINT_TECH_PREVIEW even if no ConnectX-6 card is present (BZ#1918743)</li> <li> kvm-rhel8.3 [AMD] - system crash observed while powering on virtual machine with attached VF interfaces. (BZ#1919885)</li> Enhancement(s):<br><li> [Mellanox 8.4 FEAT] mlx5: Add messages when VF-LAG fails to start (BZ#1892344)</li>

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