RHSA-2024:1840 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 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: ext4: kernel bug in ext4_write_inline_data_end() (CVE-2021-33631)
• kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size (CVE-2023-6931)

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 x86_64 - Update Services for SAP Solutions 9.0 x86_64

Fixes

• BZ - 2252731 - CVE-2023-6931 kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size
• BZ - 2261976 - CVE-2021-33631 kernel: ext4: kernel bug in ext4_write_inline_data_end()

CVEs

• CVE-2021-33631
• CVE-2023-6931

References

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