SB2026011486 - Red Hat Enterprise Linux 9 update for kernel-rt
Published: January 14, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 13 secuirty vulnerabilities.
1) Improper locking (CVE-ID: CVE-2023-52638)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the j1939_jsk_add(), j1939_sk_recv_match(), j1939_sk_recv(), j1939_sk_errqueue() and j1939_sk_netdev_event_netdown() functions in net/can/j1939/socket.c, within the j1939_netdev_start() function in net/can/j1939/main.c. A local user can perform a denial of service (DoS) attack.
2) Use-after-free (CVE-ID: CVE-2024-35868)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the cifs_stats_proc_write() function in fs/smb/client/cifs_debug.c. A remote non-authenticated attacker 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) Use-after-free (CVE-ID: CVE-2025-38724)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nfsd4_setclientid_confirm() function in fs/nfsd/nfs4state.c. A local user can escalate privileges on the system.
5) Race condition (CVE-ID: CVE-2025-39825)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within the cifs_rename2() function in fs/smb/client/inode.c. A local user can escalate privileges on the system.
6) Resource management error (CVE-ID: CVE-2025-39925)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the j1939_sk_netdev_event_netdown() function in net/can/j1939/socket.c. A local user can perform a denial of service (DoS) attack.
7) 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.
8) Out-of-bounds read (CVE-ID: CVE-2023-53680)
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 nfsd4_decode_compound() function in fs/nfsd/nfs4xdr.c. A local user can perform a denial of service (DoS) attack.
9) Out-of-bounds read (CVE-ID: CVE-2023-53675)
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 ses_enclosure_data_process() function in drivers/scsi/ses.c. A local user can perform a denial of service (DoS) attack.
10) Use-after-free (CVE-ID: CVE-2025-39982)
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_conn_complete_evt() and le_conn_complete_evt() functions in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.
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) Use-after-free (CVE-ID: CVE-2025-68287)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the dwc3_gadget_giveback() function in drivers/usb/dwc3/gadget.c. A local user can escalate privileges on the system.
13) Use-after-free (CVE-ID: CVE-2025-68285)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the monmap_show() and osdmap_show() functions in net/ceph/debugfs.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.