RHSA-2026:2573 - Security Advisory

Topic

An update for kernel 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 packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Linux kernel: ath9k_htc out-of-bounds access vulnerability (CVE-2022-49503)
• kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service (CVE-2023-53192)
• kernel: Bluetooth: hci_event: call disconnect callback before deleting conn (CVE-2023-53673)
• kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy (CVE-2025-40251)
• kernel: Linux kernel Bluetooth L2CAP: Kernel crash due to use-after-free via race condition (CVE-2023-53751)
• kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service. (CVE-2025-40304)
• kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling (CVE-2025-40322)
• kernel: ext4: fix use-after-free in ext4_orphan_cleanup (CVE-2022-50673)
• kernel: drm/i915: Fix NULL ptr deref by checking new_crtc_state (CVE-2023-53833)
• kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)
• kernel: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() (CVE-2022-50865)

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 for Power LE - Update Services for SAP Solutions 9.0 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.0 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.0 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.0 s390x

Fixes

• BZ - 2347814 - CVE-2022-49503 kernel: Linux kernel: ath9k_htc out-of-bounds access vulnerability
• BZ - 2395232 - CVE-2023-53192 kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service
• BZ - 2402193 - CVE-2023-53673 kernel: Bluetooth: hci_event: call disconnect callback before deleting conn
• BZ - 2418892 - CVE-2025-40251 kernel: devlink: rate: Unset parent pointer in devl_rate_nodes_destroy
• BZ - 2419858 - CVE-2023-53751 kernel: Linux kernel Bluetooth L2CAP: Kernel crash due to use-after-free via race condition
• BZ - 2419870 - CVE-2025-40304 kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information disclosure, or denial of service.
• BZ - 2419902 - CVE-2025-40322 kernel: Linux kernel: Information disclosure and denial of service via out-of-bounds read in font glyph handling
• BZ - 2420347 - CVE-2022-50673 kernel: ext4: fix use-after-free in ext4_orphan_cleanup
• BZ - 2420366 - CVE-2023-53833 kernel: drm/i915: Fix NULL ptr deref by checking new_crtc_state
• BZ - 2422836 - CVE-2025-68301 kernel: net: atlantic: fix fragment overflow handling in RX path
• BZ - 2426226 - CVE-2022-50865 kernel: tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

CVEs

• CVE-2022-49503
• CVE-2022-50673
• CVE-2022-50865
• CVE-2023-53192
• CVE-2023-53673
• CVE-2023-53751
• CVE-2023-53833
• CVE-2025-40251
• CVE-2025-40304
• CVE-2025-40322
• CVE-2025-68301

References

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