RHSA-2025:21136 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug (CVE-2022-48701)
• kernel: ipv6: mcast: Delay put pmc->idev in mld_del_delrec() (CVE-2025-38550)
• kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718)
• kernel: NFS: Fix a race when updating an existing write (CVE-2025-39697)
• kernel: ipv6: sr: Fix MAC comparison to be constant-time (CVE-2025-39702)
• kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() (CVE-2025-39730)
• kernel: wifi: mac80211: check S1G action frame size (CVE-2023-53257)
• kernel: wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() (CVE-2023-53213)
• kernel: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes (CVE-2023-53185)
• kernel: mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data (CVE-2023-53232)
• kernel: mm: fix zswap writeback race condition (CVE-2023-53178)
• kernel: wifi: mwifiex: Fix OOB and integer underflow when rx packets (CVE-2023-53226)
• kernel: Bluetooth: L2CAP: Fix use-after-free (CVE-2023-53305)
• kernel: pstore/ram: Check start of empty przs during init (CVE-2023-53331)
• 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: skbuff: skb_segment, Call zero copy functions before using skbuff frags (CVE-2023-53354)
• kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() (CVE-2023-53401)
• kernel: Bluetooth: Fix potential use-after-free when clear keys (CVE-2023-53386)
• kernel: Bluetooth: L2CAP: Fix user-after-free (CVE-2022-50386)
• kernel: wifi: brcmfmac: fix use-after-free bug in brcmf_netdev_start_xmit() (CVE-2022-50408)
• kernel: iomap: iomap: fix memory corruption when recording errors during writeback (CVE-2022-50406)
• kernel: crypto: xts - Handle EBUSY correctly (CVE-2023-53494)

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 for x86_64 - Update Services for SAP Solutions 9.0 x86_64

Fixes

• BZ - 2278950 - CVE-2022-48701 kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug
• BZ - 2388941 - CVE-2025-38550 kernel: ipv6: mcast: Delay put pmc->idev in mld_del_delrec()
• BZ - 2393166 - CVE-2025-38718 kernel: sctp: linearize cloned gso packets in sctp_rcv
• BZ - 2393481 - CVE-2025-39697 kernel: NFS: Fix a race when updating an existing write
• BZ - 2393533 - CVE-2025-39702 kernel: ipv6: sr: Fix MAC comparison to be constant-time
• BZ - 2393731 - CVE-2025-39730 kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()
• BZ - 2395253 - CVE-2023-53257 kernel: wifi: mac80211: check S1G action frame size
• BZ - 2395267 - CVE-2023-53213 kernel: wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()
• BZ - 2395297 - CVE-2023-53185 kernel: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes
• BZ - 2395322 - CVE-2023-53232 kernel: mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data
• BZ - 2395358 - CVE-2023-53178 kernel: mm: fix zswap writeback race condition
• BZ - 2395420 - CVE-2023-53226 kernel: wifi: mwifiex: Fix OOB and integer underflow when rx packets
• BZ - 2395858 - CVE-2023-53305 kernel: Bluetooth: L2CAP: Fix use-after-free
• BZ - 2395880 - CVE-2023-53331 kernel: pstore/ram: Check start of empty przs during init
• 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 - 2396158 - CVE-2023-53354 kernel: skbuff: skb_segment, Call zero copy functions before using skbuff frags
• BZ - 2396417 - CVE-2023-53401 kernel: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()
• BZ - 2396419 - CVE-2023-53386 kernel: Bluetooth: Fix potential use-after-free when clear keys
• BZ - 2396431 - CVE-2022-50386 kernel: Bluetooth: L2CAP: Fix user-after-free
• BZ - 2396506 - CVE-2022-50408 kernel: wifi: brcmfmac: fix use-after-free bug in brcmf_netdev_start_xmit()
• BZ - 2396538 - CVE-2022-50406 kernel: iomap: iomap: fix memory corruption when recording errors during writeback
• BZ - 2400777 - CVE-2023-53494 kernel: crypto: xts - Handle EBUSY correctly

CVEs

• CVE-2022-48701
• CVE-2022-50356
• CVE-2022-50367
• CVE-2022-50386
• CVE-2022-50406
• CVE-2022-50408
• CVE-2023-53178
• CVE-2023-53185
• CVE-2023-53213
• CVE-2023-53226
• CVE-2023-53232
• CVE-2023-53257
• CVE-2023-53305
• CVE-2023-53331
• CVE-2023-53354
• CVE-2023-53386
• CVE-2023-53401
• CVE-2023-53494
• CVE-2025-38550
• CVE-2025-38718
• CVE-2025-39697
• CVE-2025-39702
• CVE-2025-39730

References

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