RHSA-2024:2003 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.

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 unix_stream_sendpage (CVE-2023-4622)
• kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference (CVE-2020-36558)
• kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
• kernel: irdma: Improper access control (CVE-2023-25775)

Bug Fix(es):

• kernel-rt: Update RT source tree to the latest RHEL-7.9z30 batch [rhel-7.9.z] (JIRA:RHEL-26440)

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.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, 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 7 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 7 x86_64
• Red Hat Enterprise Linux for Real Time for x86_64 - Extended Life Cycle Support 7 x86_64

Fixes

• BZ - 2112693 - CVE-2020-36558 kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference
• BZ - 2187308 - CVE-2023-2002 Kernel: bluetooth: Unauthorized management command execution
• BZ - 2231410 - CVE-2023-25775 kernel: irdma: Improper access control
• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF
• BZ - 2237760 - CVE-2023-4622 kernel: use after free in unix_stream_sendpage

CVEs

• CVE-2020-36558
• CVE-2023-2002
• CVE-2023-4622
• CVE-2023-4623
• CVE-2023-25775

References

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