SB2026020971 - Red Hat Enterprise Linux 9 update for kernel
Published: February 9, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 10 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2025-21647)
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 cake_ddst(), cake_enqueue() and cake_dequeue() functions in net/sched/sch_cake.c. A local user can perform a denial of service (DoS) attack.
2) Buffer overflow (CVE-ID: CVE-2024-54456)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to memory corruption within the nfs_sysfs_link_rpc_client() function in fs/nfs/sysfs.c. A local user can escalate privileges on the system.
3) Use-after-free (CVE-ID: CVE-2025-21786)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the send_mayday() and worker_detach_from_pool() functions in kernel/workqueue.c. A local user can escalate privileges on the system.
4) Use-after-free (CVE-ID: CVE-2025-21791)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the include/net/l3mdev.h. A local user can escalate privileges on the system.
5) 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.
6) 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.
7) Out-of-bounds read (CVE-ID: CVE-2025-38568)
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 mqprio_parse_opt() function in net/sched/sch_mqprio.c. A local user can perform a denial of service (DoS) attack.
8) Out-of-bounds read (CVE-ID: CVE-2025-40294)
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 parse_adv_monitor_pattern() function in net/bluetooth/mgmt.c. A local user can perform a denial of service (DoS) attack.
9) 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.
10) Buffer overflow (CVE-ID: CVE-2025-68349)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the pnfs_mark_layout_stateid_invalid() function in fs/nfs/pnfs.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.