RHSA-2026:0536 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.

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.

Description

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

Security Fix(es):

• kernel: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)
• kernel: scsi: qla2xxx: Wait for io return on terminate rport (CVE-2023-53322)
• kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() (CVE-2023-53401)
• kernel: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898)
• kernel: nbd: fix incomplete validation of ioctl arg (CVE-2023-53513)
• kernel: NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL (CVE-2023-53680)
• kernel: RDMA/rxe: Fix mr->map double free (CVE-2022-50543)
• kernel: scsi: ses: Fix possible desc_ptr out-of-bounds accesses (CVE-2023-53675)
• kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971)
• kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() (CVE-2025-68285)

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.

Solution

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.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle Long Life 8.6 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle Long Life 8.6 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle Long Life 8.6 s390x

Fixes

• BZ - 2373329 - CVE-2025-38051 kernel: smb: client: Fix use-after-free in cifs_fill_dirent
• BZ - 2395891 - CVE-2023-53322 kernel: scsi: qla2xxx: Wait for io return on terminate rport
• BZ - 2396417 - CVE-2023-53401 kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()
• BZ - 2400598 - CVE-2025-39898 kernel: e1000e: fix heap overflow in e1000_set_eeprom
• BZ - 2400795 - CVE-2023-53513 kernel: nbd: fix incomplete validation of ioctl arg
• BZ - 2402213 - CVE-2023-53680 kernel: NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL
• BZ - 2402222 - CVE-2022-50543 kernel: RDMA/rxe: Fix mr->map double free
• BZ - 2402293 - CVE-2023-53675 kernel: scsi: ses: Fix possible desc_ptr out-of-bounds accesses
• BZ - 2404108 - CVE-2025-39971 kernel: i40e: fix idx validation in config queues msg
• BZ - 2422801 - CVE-2025-68285 kernel: libceph: fix potential use-after-free in have_mon_and_osd_map()

CVEs

• CVE-2022-50543
• CVE-2023-53322
• CVE-2023-53401
• CVE-2023-53513
• CVE-2023-53675
• CVE-2023-53680
• CVE-2025-38051
• CVE-2025-39898
• CVE-2025-39971
• CVE-2025-39973
• CVE-2025-68285

References

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