RHSA-2024:1614HighCVSS 7.8

Red Hat Security Advisory: kernel-rt security and bug fix update

Published
April 2, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (7)

CVE-2023-6546 →CVE-2023-6931 →CVE-2023-51042 →CVE-2024-0565 →CVE-2024-1086 →CVE-2021-33631 →CVE-2022-38096 →

📋 Description

CVE-2021-33631 — kernel: ext4: kernel bug in ext4_write_inline_data_end() CVE-2022-38096 — kernel: vmwgfx: NULL pointer dereference in vmw_cmd_dx_define_query CVE-2023-6546 — kernel: GSM multiplexing race condition leads to privilege escalation CVE-2023-6931 — kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size CVE-2023-51042 — kernel: use-after-free in amdgpu_cs_wait_all_fences in drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c CVE-2024-0565 — kernel: CIFS Filesystem Decryption Improper Input Validation Remote Code Execution Vulnerability in function receive_encrypted_standard of client CVE-2024-1086 — kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function

🎯 Affected products32

  • Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-0:4.18.0-513.24.1.rt7.326.el8_9.src as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-0:4.18.0-513.24.1.rt7.326.el8_9.src as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-core-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-core-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-core-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-core-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-debuginfo-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-debuginfo-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-devel-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-devel-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-kvm-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-modules-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-modules-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debug-modules-extra-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debug-modules-extra-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debuginfo-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debuginfo-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-debuginfo-common-x86_64-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-devel-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-devel-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • kernel-rt-kvm-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-modules-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 8)
  • kernel-rt-modules-0:4.18.0-513.24.1.rt7.326.el8_9.x86_64 as a component of Red Hat Enterprise Linux for Real Time (v. 8)
  • +2 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: Mitigation for this issue is either not available or the currently available options do not 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, it is possible to prevent the affected code from being loaded by blacklisting the vmwgfx kernel module. For instructions relating to blacklisting a kernel module, please see https://access.redhat.com/solutions/41278. Workaround: This flaw can be mitigated by preventing the affected `n_gsm` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. Workaround: It is not possible to trigger this issue with the default kernel.perf_event_paranoid sysctl value 2. You may check it with: cat /proc/sys/kernel/perf_event_paranoid Workaround: To mitigate this issue, prevent the amdgpu module from loading. Please see https://access.redhat.com/solutions/41278 for more information on how to prevent kernel modules from loading. Note that if a system has an AMD GPU, this may make certain features of that GPU unavailable. Workaround: To mitigate this issue, prevent module cifs 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: 1. This flaw can be mitigated by preventing the affected netfilter (nf_tables) kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. 2. If the module cannot be disabled, on non-containerized deployments of Red Hat Enterprise Linux, the mitigation is to disable user namespaces: ``` # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf ``` On containerized deployments, such as Red Hat OpenShift Container Platform, do not use the second mitigation (disabling user namespaces) as the functionality is needed to be enabled. The first mitigation (blacklisting nf_tables) is still viable for containerized deployments, providing the environment is not using netfilter.

🔗 References (10)