Issued at: 2026-09-02
Updated at: 2026-09-03
Advisory content derived from Red Hat RHSA-2026:61887, © Red Hat, Inc., used under CC BY 4.0, with modifications.
Synopsis
Important: kernel security, bug fix, and enhancement update
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: seccomp: passthrough uretprobe systemcall without filtering (CVE-2025-21834)
* kernel: ip6_tunnel: use skb_vlan_inet_prepare() in __ip6_tnl_rcv() (CVE-2026-23003)
* kernel: netfilter: nf_tables: Fix for duplicate device in netdev hooks (CVE-2026-43454)
* kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)
* kernel: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (CVE-2026-45970)
* kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)
* kernel: iommu/amd: Fix clone_alias() to use the original device's devid (CVE-2026-53053)
* kernel: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg (CVE-2026-53026)
* kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)
* kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)
* kernel: mm/huge_memory: update file PMD counter before folio_put() (CVE-2026-53189)
* kernel: mm/list_lru: drain before clearing xarray entry on reparent (CVE-2026-53153)
* 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: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() (CVE-2026-64136)
* kernel: netfilter: ipset: fix race between dump and ip_set_list resize (CVE-2026-64189)
* kernel: nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page (CVE-2026-64320)
* kernel: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() (CVE-2026-64438)
* kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304)
* kernel: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC (CVE-2026-64298)
* kernel: ALSA: virtio: Validate control metadata from the device (CVE-2026-64490)
* kernel: mm: shrinker: fix shrinker_info teardown race with expansion (CVE-2026-64418)
* kernel: smb: client: fix change notify replay double-free (CVE-2026-64384)
* kernel: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count (CVE-2026-64277)
* kernel: Input: synaptics-rmi4 - bound the F30 keymap to the GPIO/LED count (CVE-2026-64276)
* kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)
* kernel: mm/khugepaged: write all dirty file folios when collapsing (CVE-2026-68086)
* kernel: Linux kernel: Arbitrary code execution via userfaultfd shadow stack manipulation (CVE-2026-68166)
* kernel: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() (CVE-2026-72069)
* kernel: nvmet-auth: reject short AUTH_RECEIVE buffers (CVE-2026-72130)
Bug Fix(es) and Enhancement(s):
* Rocky Linux 10: s390: Revert support for DCACHE_WORD_ACCESS [rhel-10.2.z] (JIRA:Rocky Linux-188180)
* qede: build_skb failure causes off-by-one BD ring corruption and kernel panic [rhel-10.2.z] (JIRA:Rocky Linux-193043)
* ss core dumped when there is an SCTP session [rhel-10.2.z] (JIRA:Rocky Linux-212393)
* [Rocky Linux-10.2.z] Intel CWF: CPU is unable to obtain cstate1 on idle system (JIRA:Rocky Linux-218627)
* Rocky Linux10.0 - s390/pfault: Fix virtual vs physical address confusion [rhel-10.2.z] (JIRA:Rocky Linux-222507)
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.