RHSA-2026:1443 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: Linux kernel: iommufd/iova_bitmap shift-out-of-bounds vulnerability (CVE-2025-21724)
• kernel: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans (CVE-2023-53034)
• kernel: Linux kernel: SCTP use-after-free due to race condition in sendmsg (CVE-2025-23142)
• kernel: net: openvswitch: fix nested key length validation in the set() action (CVE-2025-37789)
• kernel: KVM: arm64: Tear down vGIC on failed vCPU creation (CVE-2025-37849)
• kernel: xsk: check IFF_UP earlier in Tx path (CVE-2023-53240)
• kernel: e1000e: fix heap overflow in e1000_set_eeprom (CVE-2025-39898)
• kernel: drm/i915: mark requests for GuC virtual engines to avoid use-after-free (CVE-2023-53552)
• kernel: net/mlx5e: Check for NOT_READY flag state after locking (CVE-2023-53581)
• kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971)
• kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv() (CVE-2023-53705)
• kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
• kernel: Bluetooth: ISO: Fix possible UAF on iso_conn_free (CVE-2025-40141)
• kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)

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 - Update Services for SAP Solutions 9.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64

Fixes

• BZ - 2348649 - CVE-2025-21724 kernel: Linux kernel: iommufd/iova_bitmap shift-out-of-bounds vulnerability
• BZ - 2360239 - CVE-2023-53034 kernel: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans
• BZ - 2363300 - CVE-2025-23142 kernel: Linux kernel: SCTP use-after-free due to race condition in sendmsg
• BZ - 2363315 - CVE-2025-37789 kernel: net: openvswitch: fix nested key length validation in the set() action
• BZ - 2365271 - CVE-2025-37849 kernel: KVM: arm64: Tear down vGIC on failed vCPU creation
• BZ - 2395413 - CVE-2023-53240 kernel: xsk: check IFF_UP earlier in Tx path
• BZ - 2400598 - CVE-2025-39898 kernel: e1000e: fix heap overflow in e1000_set_eeprom
• BZ - 2401514 - CVE-2023-53552 kernel: drm/i915: mark requests for GuC virtual engines to avoid use-after-free
• BZ - 2401545 - CVE-2023-53581 kernel: net/mlx5e: Check for NOT_READY flag state after locking
• BZ - 2404108 - CVE-2025-39971 kernel: i40e: fix idx validation in config queues msg
• BZ - 2405713 - CVE-2023-53705 kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()
• BZ - 2414494 - CVE-2025-40154 kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
• BZ - 2414522 - CVE-2025-40141 kernel: Bluetooth: ISO: Fix possible UAF on iso_conn_free
• BZ - 2419954 - CVE-2025-40277 kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE

CVEs

• CVE-2023-53034
• CVE-2023-53240
• CVE-2023-53552
• CVE-2023-53581
• CVE-2023-53705
• CVE-2025-21724
• CVE-2025-23142
• CVE-2025-37789
• CVE-2025-37849
• CVE-2025-39898
• CVE-2025-39971
• CVE-2025-40141
• CVE-2025-40154
• CVE-2025-40277

References

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