RHSA-2025:23947 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 7 Extended Lifecycle 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: ALSA: usb-audio: Validate UAC3 power domain descriptors, too (CVE-2025-38729)

• kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors (CVE-2025-39757)

• kernel: mm: fix zswap writeback race condition (CVE-2023-53178)

• kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp (CVE-2023-53297)

• kernel: scsi: qla2xxx: Wait for io return on terminate rport (CVE-2023-53322)

• kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy (CVE-2022-50367)

• kernel: net: sched: sfb: fix null pointer access issue when sfb_init() fails (CVE-2022-50356)

• kernel: ext4: fix undefined behavior in bit shift for ext4_check_flag_values (CVE-2022-50403)

• kernel: NFSD: Protect against send buffer overflow in NFSv2 READ (CVE-2022-50410)

• kernel: iomap: iomap: fix memory corruption when recording errors during writeback (CVE-2022-50406)

• kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect() (CVE-2025-39955)

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.