RHSA-2026:2352 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: sched: sch_cake: add bounds checks to host bulk flow fairness counts (CVE-2025-21647)

• kernel: NFS: Fix potential buffer overflowin nfs_sysfs_link_rpc_client() (CVE-2024-54456)

• kernel: workqueue: Put the pwq after detaching the rescuer from the pool (CVE-2025-21786)

• kernel: vrf: use RCU protection in l3mdev_l3_out() (CVE-2025-21791)

• kernel: RDMA/core: Fix "KASAN: slab-use-after-free Read in ib_register_device" problem (CVE-2025-38022)

• kernel: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)

• kernel: net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing (CVE-2025-38568)

• kernel: Linux kernel: Out-of-bounds write in Bluetooth MGMT can lead to information disclosure and denial of service (CVE-2025-40294)

• kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling (CVE-2025-40322)

• kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid (CVE-2025-68349)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.