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ALSA-2026:65334 — Important: kernel security, bug fix, and enhancement update

2026-10-03T14:42:59.845667+00:00

Affected: AlmaLinux:10: kernel, AlmaLinux:10: kernel-64k, AlmaLinux:10: kernel-64k-core, AlmaLinux:10: kernel-64k-debug, AlmaLinux:10: kernel-64k-debug-core, AlmaLinux:10: kernel-64k-debug-devel, AlmaLinux:10: kernel-64k-debug-devel-matched, AlmaLinux:10: kernel-64k-debug-modules, AlmaLinux:10: kernel-64k-debug-modules-core, AlmaLinux:10: kernel-64k-debug-modules-extra and 65 more

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

Security Fix(es):

* kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133) * kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response (CVE-2026-43334) * kernel: Bluetooth: virtio_bt: clamp rx length before skb_put (CVE-2026-46123) * kernel: Bluetooth: serialize accept_q access (CVE-2026-52918) * kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091) * kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER (CVE-2026-53072) * kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947) * kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256) * kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182) * kernel: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend (CVE-2026-53209) * kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254) * kernel: vfio/pci: Clean up DMABUFs before disabling function (CVE-2026-53322) * kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975) * kernel: security/keys: fix missed RCU read section on lookup (CVE-2026-64015) * kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947) * kernel: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sy…

BELL-CVE-2026-68409

2026-10-03T14:42:59.845836+00:00

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

EUVD-2026-353596

2026-10-03T14:42:59.845864+00:00

EUVD-2026-353596

fkie_cve-2026-68409

2026-10-03T14:42:59.845878+00:00

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

wifi: mac80211: defer link RX stats percpu free to RCU

sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU:

sta_info_free_link(&alloc->info); kfree_rcu(alloc, rcu_head);

The RX fast path reads link_sta under rcu_read_lock and writes the percpu stats. A reader that resolved link_sta before the removal keeps the pointer. The container stays alive from the kfree_rcu, so the read still works. But the percpu block it points to is already freed. This needs uses_rss. That is when pcpu_rx_stats exists.

The full STA teardown frees the deflink stats only after synchronize_net(). The link removal path had no such barrier. The race is hard to win in practice, but the free should still wait for RCU.

Free the link together with its data from a single RCU callback, so the percpu block is reclaimed only after readers drain.

GHSA-g5f7-qj4q-4w5v

2026-10-03T14:42:59.845914+00:00

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

wifi: mac80211: defer link RX stats percpu free to RCU

sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU:

sta_info_free_link(&alloc->info); kfree_rcu(alloc, rcu_head);

The full STA teardown frees the deflink stats only after synchronize_net(). The link removal path had no such barrier. The race is hard to win in practice, but the free should still wait for RCU.

Free the link together with its data from a single RCU callback, so the percpu block is reclaimed only after readers drain.

msrc_CVE-2026-68409 — wifi: mac80211: defer link RX stats percpu free to RCU

2026-10-03T14:42:59.845939+00:00

msrc_CVE-2026-68409

RHSA-2026:65334 — Red Hat Security Advisory: kernel security, bug fix, and enhancement update

2026-10-03T14:42:59.845957+00:00

kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response kernel: Bluetooth: virtio_bt: clamp rx length before skb_put kernel: Bluetooth: serialize accept_q access kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER kernel: net: pull headers in qdisc_pkt_len_segs_init() kernel: wifi: nl80211: reject oversized EMA RNR lists kernel: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() kernel: vfio/pci: Clean up DMABUFs before disabling function kernel: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sync kernel: Bluetooth: ISO: fix UAF in iso_recv_frame kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp kernel: security/keys: fix missed RCU read section on lookup kernel: wifi: iwlwifi: mld: fix TSO segmentation explosion when AMSDU is disabled kernel: vfio/pci: Check BAR resources before exporting a DMABUF kernel: accel/qaic: Add overflow check to remap_pfn_range during mmap kernel: ixgbevf: fix use-after-free in VEPA multicast source pruning kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb kernel: wifi: iwlwi…

RLSA-2026:65334 — Important: kernel security, bug fix, and enhancement update

2026-10-03T14:42:59.846020+00:00

Affected: Rocky Linux:10: kernel

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

Security Fix(es):

* kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)

* kernel: Bluetooth: SMP: force responder MITM requirements before building the pairing response (CVE-2026-43334)

* kernel: Bluetooth: virtio_bt: clamp rx length before skb_put (CVE-2026-46123)

* kernel: Bluetooth: serialize accept_q access (CVE-2026-52918)

* kernel: net: pull headers in qdisc_pkt_len_segs_init() (CVE-2026-53091)

* kernel: Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER (CVE-2026-53072)

* kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947)

* kernel: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (CVE-2026-53256)

* kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182)

* kernel: Bluetooth: hci_sync: reject oversized Broadcast Announcement prepend (CVE-2026-53209)

* kernel: Bluetooth: RFCOMM: validate skb length in MCC handlers (CVE-2026-53254)

* kernel: vfio/pci: Clean up DMABUFs before disabling function (CVE-2026-53322)

* kernel: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp (CVE-2026-63975)

* kernel: security/keys: fix missed RCU read section on lookup (CVE-2026-64015)

* kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report() (CVE-2026-63947)

* kernel: Bluetooth: hci_sync: fix UAF in hci_le_create_cis_sync (CVE-2026-63944)…

UBUNTU-CVE-2026-68409

2026-10-03T14:42:59.846067+00:00

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3, Ubuntu:18.04:LTS: linux-gke-4.15, Ubuntu:18.04:LTS: linux-gke-5.4 and 154 more

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: defer link RX stats percpu free to RCU sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU: sta_info_free_link(&alloc->info); kfree_rcu(alloc, rcu_head); The RX fast path reads link_sta under rcu_read_lock and writes the percpu stats. A reader that resolved link_sta before the removal keeps the pointer. The container stays alive from the kfree_rcu, so the read still works. But the percpu block it points to is already freed. This needs uses_rss. That is when pcpu_rx_stats exists. The full STA teardown frees the deflink stats only after synchronize_net(). The link removal path had no such barrier. The race is hard to win in practice, but the free should still wait for RCU. Free the link together with its data from a single RCU callback, so the percpu block is reclaimed only after readers drain.

WID-SEC-W-2026-2730 — Linux Kernel: Mehrere Schwachstellen

2026-10-03T14:42:59.846237+00:00

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, darunter möglicherweise die Ausführung von beliebigem Code, die Ausweitung von Berechtigungen, die Offenlegung von Informationen, die Manipulation von Daten oder Denial-of-Service-Zustände.