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CVE-2026-43110 — wifi: brcmfmac: validate bsscfg indices in IF events

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: validate bsscfg indices in IF events

brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check.

Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array.

[add missing wifi prefix]

RHSA-2026:21556 — Red Hat Security Advisory: kernel security update

kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr kernel: nbd: defer config unlock in nbd_genl_connect kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id kernel: iommu: disable SVA when CONFIG_X86 is set kernel: netfilter: nf_tables: release flowtable after rcu grace period on error kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold kernel: net: sched: act_csum: validate nested VLAN headers kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets kernel: smb: client: validate the whole DACL before rewriting it in cifsacl kernel: Bluetooth: MGMT: validate LTK enc_size on load kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq kernel: wifi: brcmfmac: validate bsscfg indices in IF events kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks kernel: netfilter: xt_tcpmss: check remaining length before reading optlen kernel: mm/page_alloc: clear page->private in free_pages_prepare() kernel: smb: client: validate dacloffset before building DACL pointers

RHSA-2026:23237 — Red Hat Security Advisory: kernel security update

kernel: ipv6: use RCU in ip6_xmit() kernel: ipv6: use RCU in ip6_output() kernel: net: use dst_dev_rcu() in sk_setup_caps() kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id kernel: iommu: disable SVA when CONFIG_X86 is set kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() kernel: netfilter: nf_tables: release flowtable after rcu grace period on error kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets kernel: smb: client: validate the whole DACL before rewriting it in cifsacl kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() kernel: wifi: brcmfmac: validate bsscfg indices in IF events