RHSA-2025:8643 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. 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: net: gso: fix ownership in __udp_gso_segment (CVE-2025-21926)

• kernel: vlan: enforce underlying device type (CVE-2025-21920)

• kernel: xsk: fix an integer overflow in xp_create_and_assign_umem() (CVE-2025-21997)

• kernel: net: fix geneve_opt length integer overflow (CVE-2025-22055)

• kernel: ext4: fix OOB read when checking dotdot dir (CVE-2025-37785)

• kernel: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi (CVE-2025-37943)

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.