SB2026020216 - Red Hat Enterprise Linux 9 update for kernel
Published: February 2, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 14 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2025-21724)
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 iova_bitmap_offset_to_index() function in drivers/vfio/iova_bitmap.c. A local user can perform a denial of service (DoS) attack.
2) Out-of-bounds read (CVE-ID: CVE-2023-53034)
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 switchtec_ntb_mw_set_trans() function in drivers/ntb/hw/mscc/ntb_hw_switchtec.c. A local user can perform a denial of service (DoS) attack.
3) Use-after-free (CVE-ID: CVE-2025-23142)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the sctp_transport_free() function in net/sctp/transport.c, within the sctp_writeable(), sctp_sendmsg_to_asoc(), sctp_sock_rfree() and sctp_wait_for_sndbuf() functions in net/sctp/socket.c. A local user can escalate privileges on the system.
4) Input validation error (CVE-ID: CVE-2025-37789)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the validate_set() function in net/openvswitch/flow_netlink.c. A local user can perform a denial of service (DoS) attack.
5) Memory leak (CVE-ID: CVE-2025-37849)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the kvm_arch_vcpu_create() function in arch/arm64/kvm/arm.c. A local user can perform a denial of service (DoS) attack.
6) NULL pointer dereference (CVE-ID: CVE-2023-53240)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the xsk_build_skb(), xsk_generic_xmit(), xsk_no_wakeup(), __xsk_sendmsg(), __xsk_recvmsg() and xsk_poll() functions in net/xdp/xsk.c. A local user can perform a denial of service (DoS) attack.
7) Input validation error (CVE-ID: CVE-2025-39898)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the e1000_set_eeprom() function in drivers/net/ethernet/intel/e1000e/ethtool.c. A local user can perform a denial of service (DoS) attack.
8) Memory leak (CVE-ID: CVE-2023-53552)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the i915_fence_release() function in drivers/gpu/drm/i915/i915_request.c. A local user can perform a denial of service (DoS) attack.
9) Improper locking (CVE-ID: CVE-2023-53581)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the remove_unready_flow() and mlx5e_tc_del_fdb_flow() functions in drivers/net/ethernet/mellanox/mlx5/core/en_tc.c. A local user can perform a denial of service (DoS) attack.
10) Input validation error (CVE-ID: CVE-2025-39971)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the i40e_vc_config_queues_msg() function in drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c. A local user can perform a denial of service (DoS) attack.
11) Out-of-bounds read (CVE-ID: CVE-2023-53705)
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 ipv6_find_tlv() function in net/ipv6/exthdrs_core.c. A local user can perform a denial of service (DoS) attack.
12) Out-of-bounds read (CVE-ID: CVE-2025-40154)
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 log_quirks() function in sound/soc/intel/boards/bytcr_rt5640.c. A local user can perform a denial of service (DoS) attack.
13) Use-after-free (CVE-ID: CVE-2025-40141)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the iso_sock_kill() function in net/bluetooth/iso.c. A local user can escalate privileges on the system.
14) Out-of-bounds read (CVE-ID: CVE-2025-40277)
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 vmw_cmd_check() function in drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.