Synopsis
Important: kernel security, bug fix, and enhancement update
Type/Severity
Security Advisory: Important
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: 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: kvm: Information leak within a KVM guest (CVE-2019-3016)
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):
- [FJ8.2 Bug]: kernel: retrieving process core dump of the init process (PID 1) fails (BZ#1821378)
- [FJ8.0 Bug]: System hungs up after setting parameters for hugepages (BZ#1835789)
- RHEL8.2 Alpha - ISST-LTE:PowerVM: vNIC DLPAR crashes the LPAR (ibmvnic) (BZ#1836229)
- "[sig-network] Services should be rejected when no endpoints exist" test fails frequently on RHEL8 nodes (BZ#1836302)
- RHEL8.2 Beta - RHEL8.2 reports EEH errors on internal SAS adapter during HTX run on PMEM (SCM/pmem) (BZ#1842406)
- RHEL8.1 - s390/cio: fix virtio-ccw DMA without PV (BZ#1842620)
- deadlock between modprobe and netns exit (BZ#1845164)
- exit_boot failed when install RHEL8.1 (BZ#1846180)
- http request is taking more time for endpoint running on different host via nodeport service (BZ#1847128)
- RHEL8.1 - zEDC problems on z14 (genwqe/pci) (BZ#1847453)
- WARNING: CPU: 1 PID: 0 at arch/x86/kernel/apic/vector.c:846 free_moved_vector+0x141/0x150 (BZ#1848545)
- Backport conntrack race condition fixes (BZ#1851003)
- nf_conntrack module unload fail and refcount become to negative (BZ#1851005)
- OVS: backport performance patches from upstream to 8.2z (BZ#1851235)
- RHEL8.3: backport "smp: Allow smp_call_function_single_async() to insert locked csd" (BZ#1851406)
- [DELL EMC 8.2 BUG] NVMe drive is not detected after multiple hotplug (hot add + surprise remove) operations (BZ#1852045)
Enhancement(s):
- [Mellanox 8.3 FEAT] mlx5: drivers update upto Linux v5.5 (BZ#1843544)
- [IBM 8.3 FEAT] Update nvme driver to latest level for POWER (BZ#1846405)
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 x86_64 - Extended Update Support 8.2 x86_64
-
Red Hat Enterprise Linux Server - AUS 8.2 x86_64
-
Red Hat Enterprise Linux for IBM z Systems 8 s390x
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
-
Red Hat Enterprise Linux for Power, little endian 8 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
-
Red Hat Enterprise Linux Server - TUS 8.2 x86_64
-
Red Hat Enterprise Linux for ARM 64 8 aarch64
-
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
-
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
-
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64
-
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
-
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
-
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.2 ppc64le
-
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 aarch64
Fixes
- BZ - 1786078 - CVE-2019-19807 kernel: use-after-free in sound/core/timer.c
- BZ - 1792167 - CVE-2019-3016 kernel: kvm: Information leak within a KVM guest
- 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.
CVEs
References
Vulmon