The following advisory data is extracted from:

https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_2621.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 security, bug fix, and enhancement update
Advisory ID:        RHSA-2024:2621-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2024:2621
Issue date:         2024-04-30
Revision:           03
CVE Names:          CVE-2021-33631
====================================================================

Summary: 

An update for kernel is now available for Red Hat Enterprise Linux 8.8 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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: use after free flaw in l2cap_conn_del in net/bluetooth/l2cap_core.c (CVE-2022-3640)

* kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c (CVE-2022-42895)

* kernel: GSM multiplexing race condition leads to privilege escalation (CVE-2023-6546,ZDI-CAN-20527)

* kernel: ext4: kernel bug in ext4_write_inline_data_end() (CVE-2021-33631)

* kernel: untrusted VMM can trigger int80 syscall handling (CVE-2024-25744)

Bug Fix(es):

* kernel: use after free flaw in l2cap_conn_del in net/bluetooth/l2cap_core.c (JIRA:RHEL-18806)

* tx-checksumming required for accessing port in OpenShift for RHEL 8.6 (JIRA:RHEL-20821)

* ceph: several cap and snap fixes (JIRA:RHEL-20908)

* unable to access smsc95xx based interface unless you start outgoing traffic.  (JIRA:RHEL-25718)

* [RHEL8] ] BUG bio-696 (Not tainted): Poison overwritten  (JIRA:RHEL-26100)

* kernel: ext4: kernel bug in ext4_write_inline_data_end() (JIRA:RHEL-26330)

* kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c (JIRA:RHEL-18808)

* kernel: GSM multiplexing race condition leads to privilege escalation (JIRA:RHEL-19953)

Enhancement(s):

* [IBM 8.10 FEAT] Upgrade the qeth driver to latest from upstream, e.g. kernel 6.4 (JIRA:RHEL-25810)


Solution:

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



CVEs:

CVE-2021-33631

References:

https://access.redhat.com/security/updates/classification/#important
https://bugzilla.redhat.com/show_bug.cgi?id=2139610
https://bugzilla.redhat.com/show_bug.cgi?id=2147356
https://bugzilla.redhat.com/show_bug.cgi?id=2255498
https://bugzilla.redhat.com/show_bug.cgi?id=2261976