RHSA-2024:2621 - Security Advisory

Topic

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

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 - Extended Update Support 8.8 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.8 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.8 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.8 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.8 aarch64

Fixes

• BZ - 2139610 - CVE-2022-3640 kernel: use after free flaw in l2cap_conn_del in net/bluetooth/l2cap_core.c
• BZ - 2147356 - CVE-2022-42895 kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c
• BZ - 2255498 - CVE-2023-6546 kernel: GSM multiplexing race condition leads to privilege escalation
• BZ - 2261976 - CVE-2021-33631 kernel: ext4: kernel bug in ext4_write_inline_data_end()

CVEs

• CVE-2021-33631
• CVE-2022-3640
• CVE-2022-42895
• CVE-2023-6546
• CVE-2024-25744

References

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