RHSA-2024:0562HighCVSS 8.2

Red Hat Security Advisory: kernel security and bug fix update

Published
January 30, 2024
Last Modified
November 7, 2026

🔗 CVE IDs covered (11)

CVE-2023-2163 →CVE-2023-3812 →CVE-2023-4623 →CVE-2023-38409 →CVE-2023-42753 →CVE-2022-40982 →CVE-2023-1192 →CVE-2023-4622 →CVE-2023-4921 →CVE-2023-45871 →CVE-2023-2162 →

📋 Description

CVE-2022-40982 — hw: Intel: Gather Data Sampling (GDS) side channel vulnerability CVE-2023-1192 — kernel: use-after-free in smb2_is_status_io_timeout() CVE-2023-2162 — kernel: UAF during login when accessing the shost ipaddress CVE-2023-2163 — kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe CVE-2023-3812 — kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags CVE-2023-4622 — kernel: use after free in unix_stream_sendpage CVE-2023-4623 — kernel: net/sched: sch_hfsc UAF CVE-2023-4921 — kernel: use-after-free in sch_qfq network scheduler CVE-2023-38409 — kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment CVE-2023-42753 — kernel: netfilter: potential slab-out-of-bound access due to integer underflow CVE-2023-45871 — kernel: IGB driver inadequate buffer size for frames larger than MTU

🎯 Affected products100

  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • bpftool-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.120.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.120.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.120.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-core-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-core-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-core-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-core-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-debug-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-debug-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • kernel-debug-0:4.18.0-305.120.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.4)
  • kernel-debug-core-0:4.18.0-305.120.1.el8_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.4)
  • +70 more not shown

✅ Remediation

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. Workaround: The vulnerability can be mitigated by installing the CPU microcode package microcode_ctl version 20230808. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: This flaw can be mitigated by preventing the affected iscsi_tcp.ko kernel module from loading during the boot time, ensure the module is added into the blacklist file. ~~~ Refer: How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF by the kernel.unprivileged_bpf_disabled sysctl. This would require a privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw reducing its attack space. For Red Hat Enterprise Linux 8 to confirm the current state, inspect the sysctl with the command: # cat /proc/sys/kernel/unprivileged_bpf_disabled The setting of 1 would mean that unprivileged users can not use eBPF, mitigating the flaw. Workaround: To mitigate this issue, prevent the tun module from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Workaround: Mitigation for this issue is either not available or currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: To mitigate this issue, prevent the module sch_hfsc from being loaded by blacklisting the module to prevent it from loading automatically. ~~~ https://access.redhat.com/solutions/41278 ~~~ Workaround: Mitigation for this issue is to skip loading the affected module sch_qfq onto the system until we have a fix available. This can be done by a blacklist mechanism and will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: Mitigation for this issue is to skip loading the affected module "fbcon" onto the system until we have a fix available. This can be done by a blacklist mechanism and will ensure the driver is not loaded at boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

🔗 References (15)