RHSA-2026:7003 - Security Advisory

标题

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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.

描述

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Linux kernel: Device Mapper RAID out-of-bounds access (CVE-2022-49674)
• kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem (CVE-2025-38180)
• kernel: Linux kernel: integer overflow and information disclosure via undefined shift operation in drm/amdkfd (CVE-2021-4460)
• kernel: sctp: avoid NULL dereference when chunk data buffer is missing (CVE-2025-40240)
• kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr() (CVE-2025-71085)
• kernel: macvlan: fix error recovery in macvlan_common_newlink() (CVE-2026-23209)

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.

解决方案

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.

受影响的产品

• Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

修复

• BZ - 2347967 - CVE-2022-49674 kernel: Linux kernel: Device Mapper RAID out-of-bounds access
• BZ - 2376376 - CVE-2025-38180 kernel: Linux kernel: Use-After-Free vulnerability in ATM subsystem
• BZ - 2400732 - CVE-2021-4460 kernel: Linux kernel: integer overflow and information disclosure via undefined shift operation in drm/amdkfd
• BZ - 2418832 - CVE-2025-40240 kernel: sctp: avoid NULL dereference when chunk data buffer is missing
• BZ - 2429026 - CVE-2025-71085 kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()
• BZ - 2439900 - CVE-2026-23209 kernel: macvlan: fix error recovery in macvlan_common_newlink()

CVE

• CVE-2021-4460
• CVE-2022-49674
• CVE-2025-38180
• CVE-2025-40240
• CVE-2025-71085
• CVE-2026-23209

参考

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