SB2025111715 - Red Hat Enterprise Linux 9 update for kernel
Published: November 17, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2025-38351)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the kvm_hv_vcpu_flush_tlb() function in arch/x86/kvm/hyperv.c. A local user can perform a denial of service (DoS) attack.
2) Improper privilege management (CVE-ID: CVE-2025-38498)
The vulnerability allows a local user to read and manipulate data.
The vulnerability exists due to improperly imposed permissions within the do_change_type() function in fs/namespace.c. A local user can read and manipulate data.
3) Improper locking (CVE-ID: CVE-2025-39697)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nfs_page_set_inode_ref(), nfs_page_group_lock() and nfs_inode_remove_request() functions in fs/nfs/write.c, within the nfs_page_group_unlock() function in fs/nfs/pagelist.c. A local user can perform a denial of service (DoS) attack.
4) Use-after-free (CVE-ID: CVE-2025-39881)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the of_on(), kernfs_seq_stop_active(), kernfs_seq_start(), kernfs_file_read_iter(), kernfs_fop_write_iter(), kernfs_vma_open(), kernfs_vma_fault(), kernfs_vma_page_mkwrite(), kernfs_vma_access(), kernfs_fop_mmap() and kernfs_fop_poll() functions in fs/kernfs/file.c. A local user can escalate privileges on the system.
5) 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.
6) 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.
7) Use-after-free (CVE-ID: CVE-2025-39983)
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_num_comp_pkts_evt() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.
8) Improper locking (CVE-ID: CVE-2025-40047)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the io_waitid_wait() function in io_uring/waitid.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.