RHSA-2024:1533 - 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: CIFS Filesystem Decryption Improper Input Validation Remote Code Execution Vulnerability in function receive_encrypted_standard of client (CVE-2024-0565)
• kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier (CVE-2024-26602)

Bug Fix(es):

• kernel-rt: kernel: CIFS Filesystem Decryption Improper Input Validation Remote Code Execution Vulnerability in function receive_encrypted_standard of client (JIRA:RHEL-22083)
• kernel-rt: update RT source tree to the latest RHEL-9.2.z7 Batch (JIRA:RHEL-28866)
• [RHEL9.3 nightly] NMI panic sometimes fails to start the 2nd kernel for kdump (JIRA:RHEL-24448)
• kernel-rt: kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier (JIRA:RHEL-26382)

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 - 2258518 - CVE-2024-0565 kernel: CIFS Filesystem Decryption Improper Input Validation Remote Code Execution Vulnerability in function receive_encrypted_standard of client
• BZ - 2267695 - CVE-2024-26602 kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier

CVEs

• CVE-2024-0565
• CVE-2024-26602

References

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