RHSA-2021:2185 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

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 eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
• kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)
• kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
• kernel: DoS by corrupting mountpoint reference counter (CVE-2020-12114)

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):

• RHEL8.3 - Include patch: powerpc/pci: Remove LSI mappings on device teardown (xive/pci) (BZ#1931925)
• RHEL8.2 - [P10][Denali] System crash during a perf sanity test (perf:) (BZ#1933995)
• [RHEL 8.1] AMD/EPYC nested guest virtualization L1 guest crash (BZ#1945404)
• [HPEMC 8.1 REGRESSION] skx_uncore: probe of 0008:80:08.0 failed with error -22 (BZ#1947114)
• iperf3 over geneve created on vlan would fail (BZ#1947979)
• [Azure][RHEL-8]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1952071)
• [HPEMC 8.4 REGRESSION]: perf/x86/intel/uncore kernel panic vulnerability on Haswell and Broadwell servers (BZ#1956685)

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 8.2 x86_64
• Red Hat Enterprise Linux Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
• 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 - Extended Update Support 8.2 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.2 x86_64
• 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 - 1848652 - CVE-2020-12114 kernel: DoS by corrupting mountpoint reference counter
• BZ - 1899804 - CVE-2020-28374 kernel: SCSI target (LIO) write to any block on ILO backstore
• BZ - 1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege
• BZ - 1930246 - CVE-2020-12362 kernel: Integer overflow in Intel(R) Graphics Drivers

CVEs

• CVE-2020-0466
• CVE-2020-12114
• CVE-2020-12362
• CVE-2020-28374

References

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