RHSA-2026:63014 — Security Advisory

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · September 3, 2026

Updated · November 4, 2026

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. 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: s390/cpum_sf: Handle CPU hotplug remove during sampling (CVE-2024-57849)
kernel: smc91x: fix broken irq-context in PREEMPT_RT (CVE-2025-71132)
kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CVE-2026-45970)
kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
kernel: pNFS: Fix use-after-free in pnfs_update_layout() (CVE-2026-63800)
kernel: nfsd: fix posix_acl leak on SETACL decode failure (CVE-2026-53397)
kernel: nfsd: release layout stid on setlease failure (CVE-2026-53399)
kernel: NFSv4/flexfiles: reject zero filehandle version count (CVE-2026-53392)
kernel: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr (CVE-2026-53391)
kernel: net: mana: validate rx_req_idx to prevent out-of-bounds array access (CVE-2026-64018)
kernel: Kernel: Remote out-of-bounds write in RDMA/siw (CVE-2026-64268)
kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CVE-2026-64298)
kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer (CVE-2026-74581)

Bug Fix(es) and Enhancement(s):

qede: build_skb failure causes off-by-one BD ring corruption and kernel panic [rhel-8.10.z] (JIRA:RHEL-193045)
powerpc/pseries: lparcfg - fix kbuf[] underflow (JIRA:RHEL-240144)

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.