RHSA-2024:1831HighCVSS 7.8

Red Hat Security Advisory: kernel security update

Published
April 16, 2024
Last Modified
November 6, 2026

🔗 CVE IDs covered (4)

CVE-2023-3611 →CVE-2023-3776 →CVE-2023-4921 →CVE-2023-31436 →

📋 Description

CVE-2023-3611 — kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead CVE-2023-3776 — kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function CVE-2023-4921 — kernel: use-after-free in sch_qfq network scheduler CVE-2023-31436 — kernel: out-of-bounds write in qfq_change_class function

🎯 Affected products58

  • Red Hat Enterprise Linux Server (v. 6 ELS)
  • Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-0:2.6.32-754.53.1.el6.src as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-abi-whitelists-0:2.6.32-754.53.1.el6.noarch as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debug-devel-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-devel-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debug-devel-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debuginfo-common-i686-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-common-i686-0:2.6.32-754.53.1.el6.i686 as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debuginfo-common-s390x-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • kernel-debuginfo-common-s390x-0:2.6.32-754.53.1.el6.s390x as a component of Red Hat Enterprise Linux Server Optional (v. 6 ELS)
  • kernel-debuginfo-common-x86_64-0:2.6.32-754.53.1.el6.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6 ELS)
  • +28 more not shown

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, 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 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: To mitigate this issue, prevent module cls_fw 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: To mitigate this issue, prevent the module, sch_qfq from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.

🔗 References (7)