RHSA-2024:0724HighCVSS 7.8

Red Hat Security Advisory: kernel security and bug fix update

Published
February 7, 2024
Last Modified
August 6, 2026

🔗 CVE IDs covered (57)

CVE-2023-2176 →CVE-2023-6356 →CVE-2023-6932 →CVE-2023-40283 →CVE-2022-50272 →CVE-2023-6536 →CVE-2023-54270 →CVE-2022-2586 →CVE-2023-28328 →CVE-2022-3619 →CVE-2022-3707 →CVE-2022-25265 →CVE-2022-49908 →CVE-2023-1252 →CVE-2022-2663 →CVE-2023-1989 →CVE-2021-34866 →CVE-2022-21499 →CVE-2023-45862 →CVE-2022-3623 →CVE-2022-36946 →CVE-2022-39189 →CVE-2023-2166 →CVE-2023-6817 →CVE-2023-20569 →CVE-2021-3640 →CVE-2022-0617 →CVE-2023-1075 →CVE-2021-4204 →CVE-2022-0500 →CVE-2022-28893 →CVE-2023-3141 →CVE-2023-6535 →CVE-2022-0168 →CVE-2022-28390 →CVE-2023-5717 →CVE-2022-3524 →CVE-2023-35825 · pendingCVE-2022-3566 →CVE-2022-3594 →CVE-2022-24448 →CVE-2023-0458 →CVE-2023-23455 →CVE-2023-46813 →CVE-2024-0646 →CVE-2022-3545 →CVE-2022-28388 →CVE-2022-50213 →CVE-2023-6610 →CVE-2022-2078 →CVE-2023-4132 →CVE-2023-28772 →CVE-2021-30002 →CVE-2022-1462 →CVE-2023-4921 →CVE-2022-23222 →CVE-2022-45887 →

📋 Description

CVE-2021-3640 — kernel: use-after-free vulnerability in function sco_sock_sendmsg() CVE-2021-4204 — kernel: improper input validation may lead to privilege escalation CVE-2021-30002 — kernel: memory leak for large arguments in video_usercopy function in drivers/media/v4l2-core/v4l2-ioctl.c CVE-2021-34866 — kernel: eBPF verification flaw CVE-2022-0168 — kernel: smb2_ioctl_query_info NULL pointer dereference CVE-2022-0500 — kernel: Linux ebpf logic vulnerability leads to critical memory read and write gaining root privileges CVE-2022-0617 — kernel: NULL pointer dereference in udf_expand_file_adinicbdue() during writeback CVE-2022-1462 — kernel: possible race condition in drivers/tty/tty_buffers.c CVE-2022-2078 — kernel: buffer overflow in nft_set_desc_concat_parse() CVE-2022-2586 — kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation CVE-2022-2663 — kernel: netfilter: nf_conntrack_irc message handling issue CVE-2022-3524 — kernel: memory leak in ipv6_renew_options() CVE-2022-3545 — kernel: nfp: use-after-free in area_cache_get() CVE-2022-3566 — kernel: data races around icsk->icsk_af_ops in do_ipv6_setsockopt CVE-2022-3594 — kernel: Rate limit overflow messages in r8152 in intr_callback CVE-2022-3619 — kernel: memory leak in l2cap_recv_acldata of the file net/bluetooth/l2cap_core.c CVE-2022-3623 — kernel: denial of service in follow_page_pte in mm/gup.c due to poisoned pte entry CVE-2022-3707 — kernel: Double-free in split_2MB_gtt_entry when function intel_gvt_dma_map_guest_page failed CVE-2022-21499 — kernel: possible to use the debugger to write zero into a location of choice CVE-2022-23222 — kernel: local privileges escalation in kernel/bpf/verifier.c CVE-2022-24448 — kernel: nfs_atomic_open() returns uninitialized data instead of ENOTDIR CVE-2022-25265 — kernel: Executable Space Protection Bypass CVE-2022-28388 — kernel: double free in usb_8dev_start_xmit in drivers/net/can/usb/usb_8dev.c CVE-2022-28390 — kernel: double free in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c CVE-2022-28893 — kernel: use after free in SUNRPC subsystem CVE-2022-36946 — kernel: DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c CVE-2022-39189 — kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning CVE-2022-45887 — kernel: memory leak in ttusb_dec_exit_dvb() in media/usb/ttusb-dec/ttusb_dec.c CVE-2022-49908 — kernel: Bluetooth: L2CAP: Fix memory leak in vhci_write CVE-2022-50213 — kernel: netfilter: nf_tables: do not allow SET_ID to refer to another table CVE-2022-50272 — kernel: media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer() CVE-2023-0458 — kernel: speculative pointer dereference in do_prlimit() in kernel/sys.c CVE-2023-1075 — kernel: net/tls: tls_is_tx_ready() checked list_entry CVE-2023-1252 — kernel: ovl: fix use after free in struct ovl_aio_req CVE-2023-1989 — kernel: Use after free bug in btsdio_remove due to race condition CVE-2023-2166 — kernel: NULL pointer dereference in can_rcv_filter CVE-2023-2176 — kernel: Slab-out-of-bound read in compare_netdev_and_ip CVE-2023-3141 — kernel: Use after free bug in r592_remove CVE-2023-4132 — kernel: smsusb: use-after-free caused by do_submit_urb() CVE-2023-4921 — kernel: use-after-free in sch_qfq network scheduler CVE-2023-5717 — kernel: A heap out-of-bounds write when function perf_read_group is called and sibling_list is smaller than its child's sibling_list CVE-2023-6356 — kernel: NULL pointer dereference in nvmet_tcp_build_iovec CVE-2023-6535 — kernel: NULL pointer dereference in nvmet_tcp_execute_request CVE-2023-6536 — kernel: NULL pointer dereference in __nvmet_req_complete CVE-2023-6610 — kernel: OOB Access in smb2_dump_detail CVE-2023-6817 — kernel: inactive elements in nft_pipapo_walk CVE-2023-6932 — kernel: use-after-free in IPv4 IGMP CVE-2023-20569 — amd: Return Address Predictor vulnerability leading to information disclosure CVE-2023-23455 — Kernel: denial of service in atm_tc_enqueue in net/sched/sch_atm.c due to type confusion CVE-2023-28328 — kernel: Denial of service issue in az6027 driver in drivers/media/usb/dev-usb/az6027.c CVE-2023-28772 — kernel: lib/seq_buf.c has a seq_buf_putmem_hex buffer overflow CVE-2023-35825 — kernel: r592: race condition leading to use-after-free in r592_remove() CVE-2023-40283 — kernel: use-after-free in l2cap_sock_release in net/bluetooth/l2cap_sock.c CVE-2023-45862 — kernel: drivers/usb/storage/ene_ub6250.c CVE-2023-46813 — kernel: SEV-ES local priv escalation CVE-2023-54270 — kernel: media: usb: siano: Fix use after free bugs caused by do_submit_urb CVE-2024-0646 — kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination

🎯 Affected products132

  • Red Hat CodeReady Linux Builder EUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • Red Hat Virtualization 4 Hypervisor for RHEL 8
  • bpftool-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.91.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Virtualization 4 Hypervisor for RHEL 8
  • kernel-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.91.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.91.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.91.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.91.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-core-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.91.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.91.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-0:4.18.0-372.91.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • kernel-debug-core-0:4.18.0-372.91.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.8.6)
  • +102 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 don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: For the Red Hat Enterprise Linux 7 the eBPF for unprivileged users is always disabled. For the 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. A kernel update will be required to mitigate the flaw for the root or users with CAP_SYS_ADMIN capabilities. Workaround: To mitigate this issue, prevent the module v4l2-common 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. 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 the Red Hat Enterprise Linux 7 the eBPF for unprivileged users is always disabled. For the 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. A kernel update will be required to mitigate the flaw for the root or users with CAP_SYS_ADMIN capabilities. 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: 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 7 the eBPF for unprivileged users is always disabled. 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. A kernel update will be required to mitigate the flaw for the root or users with CAP_SYS_ADMIN (or CAP_BPF) capabilities. Workaround: As the UDF module (udf.ho) will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install udf /bin/true" >> /etc/modprobe.d/disable-udf.conf If the system requires this module t\work correctly, this mitigation may not be suitable. If you need further assistance, see the KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services. 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, prevent the module nf_conntrack_irc 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. Workaround: This flaw can be mitigated by preventing the affected Netronome Flow Processor (NFP) kernel module from loading during the boot time; ensure the module is added to the blacklist file. ~~~ Refer: How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ Workaround: This flaw can be mitigated by preventing the affected Realtek RTL8152/RTL8153 Based USB Ethernet Adapters (r8152) 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: To mitigate these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the customer portal at https://access.redhat.com/solutions/268293. Alternatively, bluetooth can be disabled within the hardware or at the BIOS level, which will also provide effective mitigation as the kernel will not detect Bluetooth hardware on the system. Workaround: To mitigate this issue, prevent module usb_8dev 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: This flaw can be mitigated by preventing the affected SUNRPC driver (sunrpc) kernel module from loading during the boot time, ensuring the module is added to the blacklist file. ~~~ Refer: 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 the module nfnetlink_queue from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blocklist a kernel module to prevent it from loading automatically. Workaround: To mitigate this issue, it is possible to prevent the affected code from being loaded by blacklisting the `ttusb_dec` kernel module. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278. Workaround: To mitigate this issue, prevent module tls 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: This flaw can be mitigated by preventing the affected Generic Bluetooth SDIO driver 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: 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: 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 module nvmet-tcp 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 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: In order to trigger the issue, it requires the ability to create user/net namespaces. On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Ha…

🔗 References (56)