RHSA-2021:2190 - Security Advisory

Topic

An update for kernel-rt 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

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):

• kernel-rt: update RT source tree to the latest RHEL-8.2.z9 Batch source tree (BZ#1949685)

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 Real Time - Telecommunications Update Service 8.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service 8.2 x86_64

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