RHSA-2020:1984 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7 Extended Update Support.

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: powerpc: incomplete Spectre-RSB mitigation leads to information exposure (CVE-2019-18660)

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):

• [Stratus 7.6 Bug] Deadlock on hcd->bandwidth_mutex when usb controller fails during initialization (BZ#1764528)
• RHEL7.7 Snapshot5 - retry when cpu offline races with migration (BZ#1766094)
• Slow console output with ast (Aspeed) graphics driver (BZ#1780147)
• RHEL7.7 - qeth: add safeguards to RX data path (BZ#1792248)
• 'soft lockup' events during unmount of container file system due to bloated dentry cache / memory cgroup slab cache reclaim not available in RHEL7 (BZ#1796358)
• [GSS] Can't access the mount point due to possible blocking of i/o on rbd (BZ#1796435)
• [xfstests]: copy_file_range cause corruption on rhel-7 (BZ#1797967)
• kernel: UAF in cdev_put() when a PTP device is removed while its chardev is open (BZ#1798395)
• [HPE 7.8 Bug] RHEL7.8 kernel may ignore NMI from ilo (BZ#1798397)
• [HPEMC RHEL 7.7 RHEL 7.8 REGRESSION] kernel not populating numa_nod in /sys/devices... for PMEM (BZ#1801697)
• Unable to exclude files from auditing (BZ#1806429)
• DNAT'd packet is not unmangled upon reply on openshift node (BZ#1806446)
• port show-kabi to python3 (BZ#1806929)
• top shows super high loads when tuned profile realtime-virtual-host is applied (BZ#1808029)
• Backport CIFS stale ESTALE handling and dentry revalidation patches (BZ#1811053)
• Observed a memory leak while using dm-multipath (BZ#1812936)
• dm-multipath high load backport incorrect (BZ#1814536)

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 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64

Fixes

• BZ - 1777825 - CVE-2019-18660 kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure

CVEs

• CVE-2019-18660

References

• https://access.redhat.com/security/updates/classification/#moderate