The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_6990.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




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Red Hat Security Advisory

Synopsis:           Important: kernel-rt security update
Advisory ID:        RHSA-2024:6990-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:6990
Issue date:         2024-09-24
Revision:           03
CVE Names:          CVE-2021-47393
====================================================================

Summary: 

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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: mm/sparsemem: fix race in accessing memory_section->usage (CVE-2023-52489)

* kernel: hwmon: (mlxreg-fan) Return non-zero value when fan current state is enforced from sysfs (CVE-2021-47393)

* kernel: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk() (CVE-2021-47559)

* kernel: ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine." (CVE-2024-40984)

* kernel: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc() (CVE-2024-40995)

* kernel: xprtrdma: fix pointer derefs in error cases of rpcrdma_ep_create (CVE-2022-48773)

* kernel: vsock: remove vsock from connected table when connect is interrupted by a signal (CVE-2022-48786)

* kernel: perf: Fix list corruption in perf_cgroup_switch() (CVE-2022-48799)

* kernel: SUNRPC: lock against ->sock changing during sysfs read (CVE-2022-48816)

* kernel: mm: prevent derefencing NULL ptr in pfn_section_valid() (CVE-2024-41055)

* kernel: wifi: mac80211: Avoid address calculations via out of bounds array indexing (CVE-2024-41071)

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:

https://access.redhat.com/articles/11258



CVEs:

CVE-2021-47393

References:

https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2269189
https://bugzilla.redhat.com/show_bug.cgi?id=2282345
https://bugzilla.redhat.com/show_bug.cgi?id=2283390
https://bugzilla.redhat.com/show_bug.cgi?id=2297568
https://bugzilla.redhat.com/show_bug.cgi?id=2297579
https://bugzilla.redhat.com/show_bug.cgi?id=2298109
https://bugzilla.redhat.com/show_bug.cgi?id=2298122
https://bugzilla.redhat.com/show_bug.cgi?id=2298135
https://bugzilla.redhat.com/show_bug.cgi?id=2298155
https://bugzilla.redhat.com/show_bug.cgi?id=2300429
https://bugzilla.redhat.com/show_bug.cgi?id=2300448