(RHSA-2020:3222) Important: kernel security and bug fix update

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

Security Fix(es):

• kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)

• kernel: kernel: DAX hugepages not considered during mremap (CVE-2020-10757)

• kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection. (CVE-2020-10766)

• kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available. (CVE-2020-10767)

• kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command. (CVE-2020-10768)

• kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c (CVE-2020-12653)

• kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c (CVE-2020-12654)

• Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)

• kernel: lockdown: bypass through ACPI write via efivar_ssdt (CVE-2019-20908)

• kernel: lockdown: bypass through ACPI write via acpi_configfs (CVE-2020-15780)

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):

• [DELL EMC 8.1 BUG] : Observing Multiple “hw csum failure” while installing RHEL 8.1 on iSCSI LUN (BZ#1821374)

• kernel: provide infrastructure to support dual-signing of the kernel (foundation to help address CVE-2020-10713) (BZ#1837432)

• deadlock between modprobe and netns exit (BZ#1845163)

• exit_boot failed when install RHEL8.1 (BZ#1846179)

• http request is taking more time for endpoint running on different host via nodeport service (BZ#1847127)

• RHEL8.1 - s390/cio: fix virtio-ccw DMA without PV (BZ#1847534)

• RHEL8.1 - zEDC problems on z14 (genwqe/pci) (BZ#1847939)

• NVMe/FC with DM-MP unexpected I/O failure during “transitioning” [EIOP-8345] (BZ#1854678)

• Backport conntrack race condition fixes (BZ#1854953)

• nf_conntrack module unload fail and refcount become to negative (BZ#1854954)