RHSA-2026:3360 - Security Advisory

标题

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

描述

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

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

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

解决方案

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.

受影响的产品

• Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

修复

• BZ - 2373326 - CVE-2025-38022 kernel: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem
• BZ - 2383404 - CVE-2025-38415 kernel: Linux kernel: Memory corruption in Squashfs due to incorrect block size calculation
• BZ - 2383487 - CVE-2025-38459 kernel: Linux kernel: Denial of Service in ATM CLIP module via infinite recursion
• BZ - 2394601 - CVE-2025-39760 kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing
• BZ - 2401432 - CVE-2025-39933 kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length
• BZ - 2401510 - CVE-2023-53539 kernel: RDMA/rxe: Fix incomplete state save in rxe_requester
• BZ - 2401545 - CVE-2023-53581 kernel: net/mlx5e: Check for NOT_READY flag state after locking
• BZ - 2402193 - CVE-2023-53673 kernel: Bluetooth: hci_event: call disconnect callback before deleting conn
• BZ - 2419837 - CVE-2025-40271 kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of service.
• BZ - 2419870 - CVE-2025-40304 kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service.
• BZ - 2419902 - CVE-2025-40322 kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling
• BZ - 2420329 - CVE-2023-53821 kernel: ip6_vti: fix slab-use-after-free in decode_session6
• BZ - 2420347 - CVE-2022-50673 kernel: ext4: fix use-after-free in ext4_orphan_cleanup
• BZ - 2420366 - CVE-2023-53833 kernel: drm/i915: Fix NULL ptr deref by checking new_crtc_state
• BZ - 2420376 - CVE-2023-53827 kernel: Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
• BZ - 2424880 - CVE-2025-68349 kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid
• BZ - 2426226 - CVE-2022-50865 kernel: tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
• BZ - 2436791 - CVE-2026-23074 kernel: Linux kernel: Use-after-free in teql queueing discipline can lead to privilege escalation

CVE

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

参考

• https://access.redhat.com/security/updates/classification/#important