SB2025111715 - Red Hat Enterprise Linux 9 update for kernel

Description

This security bulletin contains information about 8 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2025-38351)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-269 - Improper Privilege Management

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-667 - Improper Locking

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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)

CWE-ID: CWE-667 - Improper Locking

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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.

References

• https://access.redhat.com/errata/RHSA-2025:21469