SB2026021170 - Red Hat Enterprise Linux 9 update for kernel-rt
Published: February 11, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 9 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-38022)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ib_device_notify_register() and ib_register_device() functions in drivers/infiniband/core/device.c. A local user can escalate privileges on the system.
2) Use-after-free (CVE-ID: CVE-2025-38051)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the find_cifs_entry() function in fs/cifs/readdir.c. A local user can escalate privileges on the system.
3) Use-after-free (CVE-ID: CVE-2023-53673)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hci_cs_disconnect() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.
4) Double free (CVE-ID: CVE-2025-40096)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a double free error within the drm_sched_job_add_implicit_dependencies() function in drivers/gpu/drm/scheduler/sched_main.c. A local user can perform a denial of service (DoS) attack.
5) Use-after-free (CVE-ID: CVE-2025-40258)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the mptcp_reset_rtx_timer() function in net/mptcp/protocol.c. A local user can escalate privileges on the system.
6) Memory leak (CVE-ID: CVE-2025-40251)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the devl_rate_nodes_destroy() function in net/devlink/rate.c. A local user can perform a denial of service (DoS) attack.
7) Out-of-bounds read (CVE-ID: CVE-2025-40304)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the bit_putcs() function in drivers/video/fbdev/core/bitblit.c. A local user can perform a denial of service (DoS) attack.
8) Out-of-bounds read (CVE-ID: CVE-2025-40322)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the bit_putcs_aligned() and bit_putcs_unaligned() functions in drivers/video/fbdev/core/bitblit.c. A local user can perform a denial of service (DoS) attack.
9) NULL pointer dereference (CVE-ID: CVE-2023-53833)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the intel_prepare_plane_fb() function in drivers/gpu/drm/i915/display/intel_atomic_plane.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.