RHSA-2025:23947 - Security Advisory

Topic

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.

Description

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 2393164 - CVE-2025-38729 kernel: ALSA: usb-audio: Validate UAC3 power domain descriptors, too
• BZ - 2394615 - CVE-2025-39757 kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors
• BZ - 2395358 - CVE-2023-53178 kernel: mm: fix zswap writeback race condition
• BZ - 2395681 - CVE-2023-53297 kernel: Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
• BZ - 2395891 - CVE-2023-53322 kernel: scsi: qla2xxx: Wait for io return on terminate rport
• BZ - 2396114 - CVE-2022-50367 kernel: fs: fix UAF/GPF bug in nilfs_mdt_destroy
• BZ - 2396152 - CVE-2022-50356 kernel: net: sched: sfb: fix null pointer access issue when sfb_init() fails
• BZ - 2396494 - CVE-2022-50403 kernel: ext4: fix undefined behavior in bit shift for ext4_check_flag_values
• BZ - 2396536 - CVE-2022-50410 kernel: NFSD: Protect against send buffer overflow in NFSv2 READ
• BZ - 2396538 - CVE-2022-50406 kernel: iomap: iomap: fix memory corruption when recording errors during writeback
• BZ - 2402699 - CVE-2025-39955 kernel: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect()

CVEs

• CVE-2022-50356
• CVE-2022-50367
• CVE-2022-50403
• CVE-2022-50406
• CVE-2022-50410
• CVE-2023-53178
• CVE-2023-53297
• CVE-2023-53322
• CVE-2025-38729
• CVE-2025-39757
• CVE-2025-39955

References

• https://access.redhat.com/security/updates/classification/#moderate