RHSA-2020:2429 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions.

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: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic (CVE-2020-10711)
• Kernel: s390: page table upgrade in secondary address mode may lead to privilege escalation (CVE-2020-11884)
• kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body (CVE-2020-12657)
• 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):

• kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840684)
• missing version.h dependency for modpost may cause build to fail (BZ#1828227)
• efi: kernel panic during ltp fs test - read_all -d /sys -q -r 10 (BZ#1829525)

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 Server for Power LE - Update Services for SAP Solutions 8.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.0 x86_64

Fixes

• BZ - 1777825 - CVE-2019-18660 kernel: powerpc: incomplete Spectre-RSB mitigation leads to information exposure
• BZ - 1825116 - CVE-2020-10711 Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic
• BZ - 1828149 - CVE-2020-11884 Kernel: s390: page table upgrade in secondary address mode may lead to privilege escalation
• BZ - 1832866 - CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body

CVEs

• CVE-2019-18660
• CVE-2020-10711
• CVE-2020-11884
• CVE-2020-12657

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/solutions/5142691