Alerts This Week
Warning Icon 1 727
Alerts This Week
Warning Icon 1 727

Red Hat Enterprise Linux 8: RHSA-2020-2427-01 Important Kernel Fix

red hat
Calendar Grey June 9, 2020
Dist Redhat Esm H88
Significant kernel enhancement for Red Hat Enterprise Linux 8 addresses vulnerabilities and system malfunctions. Examine essential modifications.
An update for kernel is now available for Red Hat Enterprise Linux 8

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.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body (CVE-2020-12657)
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):
* kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1827191)
* ipsec interfaces: fix sending with bpf_redirect() / AF_PACKET sockets (BZ#1821375)
* IB/core: deadlock on rdma_nl_mutex when netlink triggers on-demand modprobe rdma_cm (BZ#1821381)
* dm: fix excessive bio splitting that results in performance regressions (BZ#1821382)
* system time jumps when hotplug vcpu on a long uptime guest (BZ#1822498)
* [DELL 8.2 BUG]Ethernet : e1000e doesn't work after S2I (BZ#1825262)
* NFSv3 sec=krb5p fails against an ONTAP server (BZ#1826219)
* Stand-alone CPU Linpack test reports bad residual on HPC Cluster node(s) while running RHEL 8 (BZ#1827619)
* [DELL 8.2 BUG]bluetooth Scanning block S3 and Suspend to idle (BZ#1827620)
* RHEL8.2 Beta - SMC-R connection with vlan-id fails (BZ#1827631)
* RHEL8.1 - RHEL8.1 kernel 4.18.0-147.3.1.el8.bz181950_test001.ppc64le+debug failed during LPM test (p8/p9):idahop08:LPM (vtpm) (BZ#1827632)
* missing version.h dependency for modpost may cause build to fail (BZ#1828229)
* efi: kernel panic during ltp fs test - read_all -d /sys -q -r 10 (BZ#1829527)
* Let "isolcpus=" skip unknown sub-parameters (BZ#1832367)
* RHEL8.0 - Very bad performance with small blocks in FC-IO found by SAP HANA on POWER tests on RHEL8.0 (compared to RHEL7.4) (BZ#1834517)
* [FJ8.2 Bug]: [REG] NFS-client panic at nfs4_get_valid_delegation+0x1c/0x40 [nfsv4] (BZ#1837969)
* [RHEL-8.3] upstream bonding driver refresh (BZ#1838477)
* Enable xt_u32 module (BZ#1840799)
* Move xt_u32 module to kernel-modules-extra (BZ#1840800)

Topics%20covered

Topics Covered

security advisory Red Hat bug fix important kernel security impact use-after-free

References

https://access.redhat.com/security/cve/CVE-2020-12657 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/solutions/5142691

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kernel-4.18.0-193.6.3.el8_2.src.rpm
aarch64: bpftool-4.18.0-193.6.3.el8_2.aarch64.rpm bpftool-debuginfo-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-core-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-cross-headers-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-core-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-debuginfo-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-devel-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-modules-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debug-modules-extra-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debuginfo-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-devel-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-headers-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-modules-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-modules-extra-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-tools-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-tools-debuginfo-4.18.0-193.6.3.el8_2.aarch64.rpm kernel-tools-libs-4.18.0-193.6.3.el8_2.aarch64.rpm perf-4.18.0-193.6.3.el8_2.aarch64.rpm perf-debuginfo-4.18.0-193.6.3.el8_2.aarch64.rpm python3-perf-4.18.0-193.6.3.el8_2.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:2427-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2427
Issue date: 2020-06-09

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix important kernel security impact use-after-free

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1832866 - CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here