The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_7379.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-2023:7379-01
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:7379
Issue date:         2023-11-21
Revision:           01
CVE Names:          CVE-2022-27672
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Summary: 

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 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: net/sched: cls_u32 component reference counter leak if tcf_change_indev() fails (CVE-2023-3609)

* kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags (CVE-2023-3812)

* kernel: net/sched: Use-after-free vulnerabilities in the net/sched classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128, CVE-2023-4206, CVE-2023-4207, CVE-2023-4208)

* kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)

* kernel: netfilter: potential slab-out-of-bound access due to integer underflow (CVE-2023-42753)

* kernel: AMD: Cross-Thread Return Address Predictions (CVE-2022-27672)

* hw: Intel: Gather Data Sampling (GDS) side channel vulnerability (CVE-2022-40982)

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-2022-27672

References:

https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/solutions/7027704
https://bugzilla.redhat.com/show_bug.cgi?id=2174765
https://bugzilla.redhat.com/show_bug.cgi?id=2223949
https://bugzilla.redhat.com/show_bug.cgi?id=2224048
https://bugzilla.redhat.com/show_bug.cgi?id=2225201
https://bugzilla.redhat.com/show_bug.cgi?id=2225511
https://bugzilla.redhat.com/show_bug.cgi?id=2239843
https://bugzilla.redhat.com/show_bug.cgi?id=2241924