RHSA-2026:3360HighCVSS 7.8

Red Hat Security Advisory: kernel security update

Published
February 25, 2026
Last Modified
August 13, 2026

🔗 CVE IDs covered (18)

CVE-2023-53833 →CVE-2025-38022 →CVE-2025-38415 →CVE-2025-40322 →CVE-2026-23074 →CVE-2023-53539 →CVE-2023-53673 →CVE-2025-39933 →CVE-2025-40271 →CVE-2022-50673 →CVE-2023-53827 →CVE-2025-68349 →CVE-2025-38459 →CVE-2025-39760 →CVE-2025-40304 →CVE-2022-50865 →CVE-2023-53581 →CVE-2023-53821 →

📋 Description

CVE-2022-50673 — kernel: ext4: fix use-after-free in ext4_orphan_cleanup CVE-2022-50865 — kernel: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() CVE-2023-53539 — kernel: RDMA/rxe: Fix incomplete state save in rxe_requester CVE-2023-53581 — kernel: net/mlx5e: Check for NOT_READY flag state after locking CVE-2023-53673 — kernel: Bluetooth: hci_event: call disconnect callback before deleting conn CVE-2023-53821 — kernel: ip6_vti: fix slab-use-after-free in decode_session6 CVE-2023-53827 — kernel: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} CVE-2023-53833 — kernel: drm/i915: Fix NULL ptr deref by checking new_crtc_state CVE-2025-38022 — kernel: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem CVE-2025-38415 — kernel: Linux kernel: Memory corruption in Squashfs due to incorrect block size calculation CVE-2025-38459 — kernel: Linux kernel: Denial of Service in ATM CLIP module via infinite recursion CVE-2025-39760 — kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing CVE-2025-39933 — kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length CVE-2025-40271 — kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of service. CVE-2025-40304 — kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service. CVE-2025-40322 — kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling CVE-2025-68349 — kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid CVE-2026-23074 — kernel: Linux kernel: Use-after-free in teql queueing discipline can lead to privilege escalation

🎯 Affected products52

  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • bpftool-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • bpftool-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-0:4.18.0-305.186.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.186.1.el8_4.src as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.186.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-abi-stablelists-0:4.18.0-305.186.1.el8_4.noarch as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-core-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-core-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-core-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-core-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-devel-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-devel-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-modules-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-modules-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debug-modules-extra-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debug-modules-extra-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debuginfo-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • kernel-debuginfo-common-x86_64-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • kernel-debuginfo-common-x86_64-0:4.18.0-305.186.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • +22 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: To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules. Workaround: To mitigate this issue, prevent the mlx5_core module from loading. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules. Workaround: To mitigate this issue, prevent the i915 module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module. Note that this will disable Intel integrated graphics. 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 `fbdev` kernel module from loading if it is not required for system operation. Create a file named `/etc/modprobe.d/disable-fbdev.conf` with the following content: ``` install fbdev /bin/true blacklist fbdev ``` After creating the file, regenerate the initramfs using `dracut -f -v` and reboot the system for the changes to take effect. This mitigation may impact systems that rely on `fbdev` for console display or specific graphics hardware, requiring careful evaluation before implementation. Workaround: If NFS service not being used, then disable it to prevent possibility of triggering this bug (and usually it is disabled by default): sudo systemctl stop nfs-server sudo systemctl disable nfs-server

🔗 References (21)