RHSA-2026:1495 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: mac80211: fix potential double free on mesh join (CVE-2022-49290)
• kernel: net: bonding: fix use-after-free after 802.3ad slave unbind (CVE-2022-49667)
• kernel: Linux kernel: be2net buffer overflow in be_get_module_eeprom (CVE-2022-49581)
• kernel: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans (CVE-2023-53034)
• 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: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)
• kernel: RDMA/rxe: Fix incomplete state save in rxe_requester (CVE-2023-53539)
• kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971)
• kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
• kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
• kernel: mptcp: fix race condition in mptcp_schedule_work() (CVE-2025-40258)
• 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 9.0 x86_64

Fixes

• BZ - 2347727 - CVE-2022-49290 kernel: mac80211: fix potential double free on mesh join
• BZ - 2347982 - CVE-2022-49667 kernel: net: bonding: fix use-after-free after 802.3ad slave unbind
• BZ - 2348269 - CVE-2022-49581 kernel: Linux kernel: be2net buffer overflow in be_get_module_eeprom
• BZ - 2360239 - CVE-2023-53034 kernel: ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans
• 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 - 2373329 - CVE-2025-38051 kernel: smb: client: Fix use-after-free in cifs_fill_dirent
• BZ - 2401510 - CVE-2023-53539 kernel: RDMA/rxe: Fix incomplete state save in rxe_requester
• BZ - 2404108 - CVE-2025-39971 kernel: i40e: fix idx validation in config queues msg
• BZ - 2414494 - CVE-2025-40154 kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
• BZ - 2418872 - CVE-2025-40248 kernel: Linux kernel: vsock vulnerability may lead to memory corruption
• BZ - 2418876 - CVE-2025-40258 kernel: mptcp: fix race condition in mptcp_schedule_work()
• BZ - 2419954 - CVE-2025-40277 kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE

CVEs

• CVE-2022-49290
• CVE-2022-49581
• CVE-2022-49667
• CVE-2023-53034
• CVE-2023-53539
• CVE-2025-37789
• CVE-2025-37849
• CVE-2025-38051
• CVE-2025-39971
• CVE-2025-40154
• CVE-2025-40248
• CVE-2025-40258
• CVE-2025-40277

References

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