Moderate: kernel-rt security and bug fix update

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.

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

Security Fix(es):

• information leak in scsi_ioctl() (CVE-2022-0494)
• use-after-free in tc_new_tfilter() in net/sched/cls_api.c (CVE-2022-1055)

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):

• update RT source tree to the latest RHEL-9.0.z2 Batch (BZ#2105450)

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 9 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 9 x86_64
• Red Hat Enterprise Linux for Real Time for x86_64 - 4 years of updates 9.0 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.0 x86_64

Fixes

• BZ - 2039448 - CVE-2022-0494 kernel: information leak in scsi_ioctl()
• BZ - 2070220 - CVE-2022-1055 kernel: use-after-free in tc_new_tfilter() in net/sched/cls_api.c

CVEs

• CVE-2022-0494
• CVE-2022-1055

References

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