Issued at: 2026-09-04
Updated at: 2026-09-05
Advisory content derived from Red Hat RHSA-2026:63013, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: kernel-rt security, bug fix, and enhancement update
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: 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:Rocky Linux-193045)
* powerpc/pseries: lparcfg - fix kbuf[] underflow (JIRA:Rocky Linux-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.