RHSA-2024:3854 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.

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):

• kernel: KVM: SVM: improper check in svm_set_x2apic_msr_interception allows direct access to host x2apic msrs (CVE-2023-5090)
• kernel: bluetooth: bt_sock_ioctl race condition leads to use-after-free in bt_sock_recvmsg (CVE-2023-51779)
• kernel: kvm: Avoid potential UAF in LPI translation cache (CVE-2024-26598)
• kernel: net/mlx5e: fix a potential double-free in fs_any_create_groups (CVE-2023-52667)

Bug Fix:

• kernel-rt: update RT source tree to the latest RHEL-9.2 ad hoc schedule build (JIRA:RHEL-38545)

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

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 for x86_64 - 4 years of updates 9.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.2 x86_64

Fixes

• BZ - 2248122 - CVE-2023-5090 kernel: KVM: SVM: improper check in svm_set_x2apic_msr_interception allows direct access to host x2apic msrs
• BZ - 2256822 - CVE-2023-51779 kernel: bluetooth: bt_sock_ioctl race condition leads to use-after-free in bt_sock_recvmsg
• BZ - 2265801 - CVE-2024-26598 kernel: kvm: Avoid potential UAF in LPI translation cache
• BZ - 2281350 - CVE-2023-52667 kernel: net/mlx5e: fix a potential double-free in fs_any_create_groups

CVEs

• CVE-2023-5090
• CVE-2023-51779
• CVE-2023-52667
• CVE-2024-26598

References

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