Synopsis
Important: kernel security and bug fix update
Type/Severity
Security Advisory: Important
Topic
An update for kernel is now available for Red Hat Enterprise Linux 8.1 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: 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)
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 8.1 x86_64
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.1 s390x
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.1 ppc64le
-
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.1 aarch64
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.1 ppc64le
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.1 x86_64
-
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.1 x86_64
-
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.1 ppc64le
-
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.1 aarch64
Fixes
- BZ - 1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
- BZ - 1831868 - CVE-2020-12653 kernel: buffer overflow in mwifiex_cmd_append_vsie_tlv function in drivers/net/wireless/marvell/mwifiex/scan.c
- BZ - 1832530 - CVE-2020-12654 kernel: heap-based buffer overflow in mwifiex_ret_wmm_get_status function in drivers/net/wireless/marvell/mwifiex/wmm.c
- BZ - 1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario
- BZ - 1842525 - CVE-2020-10757 kernel: kernel: DAX hugepages not considered during mremap
- BZ - 1845840 - CVE-2020-10766 kernel: Rogue cross-process SSBD shutdown. Linux scheduler logical bug allows an attacker to turn off the SSBD protection.
- BZ - 1845867 - CVE-2020-10767 kernel: Indirect Branch Prediction Barrier is force-disabled when STIBP is unavailable or enhanced IBRS is available.
- BZ - 1845868 - CVE-2020-10768 kernel: Indirect branch speculation can be enabled after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.
- BZ - 1852942 - CVE-2019-20908 kernel: lockdown: bypass through ACPI write via efivar_ssdt
- BZ - 1852962 - CVE-2020-15780 kernel: lockdown: bypass through ACPI write via acpi_configfs
CVEs
References
Vulmon