Synopsis
Moderate: kernel security and bug fix update
Type/Severity
Security Advisory: Moderate
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 Moderate. 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: information exposure in drivers/char/random.c and kernel/time/timer.c (CVE-2020-16166)
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):
- Backport upstream OVS performance patch fix (BZ#1879935)
- Sleeping or scheduling after sched_cpu_dying() led to "scheduling while atomic" and BUG at kernel/cpu.c:907! (BZ#1880080)
- [conntrack] udp packet reverse NAT occasionally fail when race condition request combination with the DNAT load balancing rules (BZ#1882094)
- Unexpected fragmentation needed error, OpenShift 4, OVS, VXLAN, GSO, Azure (BZ#1885766)
- Unable to attach VLAN-based logical networks to a bond (BZ#1886017)
- NFS server with krb5p fails in FIPS mode: context_derive_keys_new: Error 22 deriving initiator_seal key (BZ#1886189)
- XFS: reflinked file data corruption (BZ#1886895)
- [HPE 8.3 Bug] Kdump bootup failure caused by an amd iommu commit for Rhel8.3 BetaOS on DL325Gen10 (BZ#1888113)
- dm: fix bio splitting and its bio completion order for regular IO (BZ#1890233)
- geneve: add transport ports in route lookup for geneve (BZ#1891818)
- HRTICK not armed in specific cases with SCHED_DEADLINE (BZ#1894073)
- PM/swap Speed up hibernation by batching requests (BZ#1894629)
- RHEL8.1 - ibmveth is producing TX errors over VXLAN when large send (TSO) is enabled (-> related to Red Hat bug 1816254 - OCP 4.3 - Authentication clusteroperator is in unknown state on POWER 9 servers") (BZ#1896299)
- RHEL8.2 - mm/gup: fix gup_fast with dynamic page table folding (BZ#1896351)
- [Azure][RHEL-8]TX/RX packets stop increasing after hibernation/resume in VM with CX4 VF NIC (BZ#1896433)
- [Azure][RHEL-8]VM hangs after hibernation/resume if the VM has SRIOV NIC and has been deallocated (BZ#1896434)
- [Azure] hv_irq_unmask() failed: 0x5 after resume from hibernation in NV6 size (BZ#1896435)
- block layer: update to upstream v5.8 (BZ#1896787)
- [Regression] RHEL8.2 zstream - Undetected Data corruption in MPI workloads that use VSX for reductions on POWER9 DD2.1 systems (BZ#1897278)
- Incorrect system time reported through the CPU Accounting statistics (BZ#1897716)
- debug kernel reports BUG: sleeping function called from invalid context at mm/slab.h:496 in aws t4g instances (BZ#1898758)
- ARO: excessive pod memory allocation causes node lockup (BZ#1901547)
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 IBM z Systems 8 s390x
-
Red Hat Enterprise Linux for Power, little endian 8 ppc64le
-
Red Hat Enterprise Linux for ARM 64 8 aarch64
-
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
Fixes
- BZ - 1865751 - CVE-2020-16166 kernel: information exposure in drivers/char/random.c and kernel/time/timer.c
CVEs
References
Vulmon