RHSA-2024:2582 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, and Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions.

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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (CVE-2023-40283)
• kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption (CVE-2024-26586)
• kernel: netfilter: divide error in nft_limit_init (CVE-2021-46915)
• kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier (CVE-2024-26602)

Bug Fix(es):

• kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c (JIRA:RHEL-18996)
• rbd: don't move requests to the running list on errors [8.x] (JIRA:RHEL-24201)
• TRIAGE CVE-2021-46915 kernel: netfilter: divide error in nft_limit_init (JIRA:RHEL-28179)
• [RHEL 8.4] Soft Lockups from BZ-2174623 hit on RHEL 8.4 (JIRA:RHEL-16035)
• kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier (JIRA:RHEL-26386)
• kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption (JIRA:RHEL-29181)
• Intel i40e driver performance issue (JIRA:RHEL-30402)

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 Life Cycle Long Life 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64
• Red Hat Enterprise Linux Server - TUS 8.4 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle Long Life 8.4 ppc64le

Fixes

• BZ - 2231800 - CVE-2023-40283 kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c
• BZ - 2265645 - CVE-2024-26586 kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption
• BZ - 2266423 - CVE-2021-46915 kernel: netfilter: divide error in nft_limit_init
• BZ - 2267695 - CVE-2024-26602 kernel: sched/membarrier: reduce the ability to hammer on sys_membarrier

CVEs

• CVE-2021-46915
• CVE-2023-40283
• CVE-2024-26586
• CVE-2024-26602

References

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